man doesn't display man pages; what to do if 'mandb -c' doesn't fix it? Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)Why can't I find any manpages?Man pages offline for e-reader?Man pages from custom locationHow best to read the man pages?ubuntu man command display blank pagesBroken man pagesOnline Ubuntu man pages only showing i386?problems with man pagesFull man pages indexSome system call man pages missingman pages broken after dist-upgrade

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man doesn't display man pages; what to do if 'mandb -c' doesn't fix it?



Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)Why can't I find any manpages?Man pages offline for e-reader?Man pages from custom locationHow best to read the man pages?ubuntu man command display blank pagesBroken man pagesOnline Ubuntu man pages only showing i386?problems with man pagesFull man pages indexSome system call man pages missingman pages broken after dist-upgrade



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0















I have an Ubuntu 18.04.2 LTS system that won't display man pages.



# man man || echo fail
#


This AskUbuntu question suggests that I try running mandb -c.



mandb -c runs to successful completion, but with some warnings:



# time mandb -c; echo $?
Processing manual pages under /usr/share/man...
Updating index cache for path `/usr/share/man/man3'. Wait...mandb: warning: /usr/share/man/man3/pcredemo.3.gz: whatis parse for pcredemo(3) failed
Updating index cache for path `/usr/share/man/man6'. Wait...done.
Checking for stray cats under /usr/share/man...
Checking for stray cats under /var/cache/man...
Processing manual pages under /usr/share/man/de...
Updating index cache for path `/usr/share/man/de/man5'. Wait...done.
Checking for stray cats under /usr/share/man/de...
Checking for stray cats under /var/cache/man/de...
Processing manual pages under /usr/share/man/fi...
Updating index cache for path `/usr/share/man/fi/man1'. Wait...done.
Checking for stray cats under /usr/share/man/fi...
Checking for stray cats under /var/cache/man/fi...
Processing manual pages under /usr/share/man/zh_CN...
Updating index cache for path `/usr/share/man/zh_CN/man5'. Wait...done.
Checking for stray cats under /usr/share/man/zh_CN...
Checking for stray cats under /var/cache/man/zh_CN...
Processing manual pages under /usr/share/man/nl...
Updating index cache for path `/usr/share/man/nl/man5'. Wait...done.
Checking for stray cats under /usr/share/man/nl...
Checking for stray cats under /var/cache/man/nl...
Processing manual pages under /usr/share/man/hu...
Updating index cache for path `/usr/share/man/hu/man5'. Wait...done.
Checking for stray cats under /usr/share/man/hu...
Checking for stray cats under /var/cache/man/hu...
Processing manual pages under /usr/share/man/it...
Updating index cache for path `/usr/share/man/it/man5'. Wait...done.
Checking for stray cats under /usr/share/man/it...
Checking for stray cats under /var/cache/man/it...
Processing manual pages under /usr/share/man/da...
Updating index cache for path `/usr/share/man/da/man5'. Wait...done.
Checking for stray cats under /usr/share/man/da...
Checking for stray cats under /var/cache/man/da...
Processing manual pages under /usr/share/man/sv...
Updating index cache for path `/usr/share/man/sv/man5'. Wait...done.
Checking for stray cats under /usr/share/man/sv...
Checking for stray cats under /var/cache/man/sv...
Processing manual pages under /usr/share/man/sr...
Updating index cache for path `/usr/share/man/sr/man5'. Wait...done.
Checking for stray cats under /usr/share/man/sr...
Checking for stray cats under /var/cache/man/sr...
Processing manual pages under /usr/share/man/cs...
Updating index cache for path `/usr/share/man/cs/man1'. Wait...mandb: warning: /usr/share/man/cs/man1/sensible-editor.1.gz: whatis parse for sensible-editor(1) failed
Updating index cache for path `/usr/share/man/cs/man5'. Wait...done.
Checking for stray cats under /usr/share/man/cs...
Checking for stray cats under /var/cache/man/cs...
Processing manual pages under /usr/share/man/ja...
Updating index cache for path `/usr/share/man/ja/man5'. Wait...done.
Checking for stray cats under /usr/share/man/ja...
Checking for stray cats under /var/cache/man/ja...
Processing manual pages under /usr/share/man/ko...
Updating index cache for path `/usr/share/man/ko/man5'. Wait...done.
Checking for stray cats under /usr/share/man/ko...
Checking for stray cats under /var/cache/man/ko...
Processing manual pages under /usr/share/man/fr...
Updating index cache for path `/usr/share/man/fr/man5'. Wait...done.
Checking for stray cats under /usr/share/man/fr...
Checking for stray cats under /var/cache/man/fr...
Processing manual pages under /usr/share/man/zh_TW...
Updating index cache for path `/usr/share/man/zh_TW/man5'. Wait...done.
Checking for stray cats under /usr/share/man/zh_TW...
Checking for stray cats under /var/cache/man/zh_TW...
Processing manual pages under /usr/share/man/es...
Updating index cache for path `/usr/share/man/es/man5'. Wait...done.
Checking for stray cats under /usr/share/man/es...
Checking for stray cats under /var/cache/man/es...
Processing manual pages under /usr/share/man/sl...
Updating index cache for path `/usr/share/man/sl/man1'. Wait...done.
Checking for stray cats under /usr/share/man/sl...
Checking for stray cats under /var/cache/man/sl...
Processing manual pages under /usr/share/man/pt...
Updating index cache for path `/usr/share/man/pt/man5'. Wait...done.
Checking for stray cats under /usr/share/man/pt...
Checking for stray cats under /var/cache/man/pt...
Processing manual pages under /usr/share/man/pt_BR...
Updating index cache for path `/usr/share/man/pt_BR/man5'. Wait...done.
Checking for stray cats under /usr/share/man/pt_BR...
Checking for stray cats under /var/cache/man/pt_BR...
Processing manual pages under /usr/share/man/ru...
Updating index cache for path `/usr/share/man/ru/man5'. Wait...done.
Checking for stray cats under /usr/share/man/ru...
Checking for stray cats under /var/cache/man/ru...
Processing manual pages under /usr/share/man/pl...
Updating index cache for path `/usr/share/man/pl/man5'. Wait...done.
Checking for stray cats under /usr/share/man/pl...
Checking for stray cats under /var/cache/man/pl...
Processing manual pages under /usr/share/man/id...
Updating index cache for path `/usr/share/man/id/man5'. Wait...done.
Checking for stray cats under /usr/share/man/id...
Checking for stray cats under /var/cache/man/id...
Processing manual pages under /usr/share/man/tr...
Updating index cache for path `/usr/share/man/tr/man5'. Wait...done.
Checking for stray cats under /usr/share/man/tr...
Checking for stray cats under /var/cache/man/tr...
Processing manual pages under /usr/share/man/vi...
Updating index cache for path `/usr/share/man/vi/man1'. Wait...done.
Checking for stray cats under /usr/share/man/vi...
Checking for stray cats under /var/cache/man/vi...
Processing manual pages under /usr/local/man...
Updating index cache for path `/usr/local/man/man3'. Wait...mandb: warning: /usr/local/man/man3/Pegex::API.3pm: whatis parse for Pegex::API(3pm) failed
mandb: warning: /usr/local/man/man3/Pegex::Syntax.3pm: whatis parse for Pegex::Syntax(3pm) failed
mandb: warning: /usr/local/man/man3/Pegex::Tutorial.3pm: whatis parse for Pegex::Tutorial(3pm) failed
mandb: warning: /usr/local/man/man3/Pegex::Tutorial::Calculator.3pm: whatis parse for Pegex::Tutorial::Calculator(3pm) failed
mandb: warning: /usr/local/man/man3/Pegex::Resources.3pm: whatis parse for Pegex::Resources(3pm) failed
mandb: warning: /usr/local/man/man3/Pegex::Tutorial::JSON.3pm: whatis parse for Pegex::Tutorial::JSON(3pm) failed
mandb: warning: /usr/local/man/man3/Pegex::Miscellany.3pm: whatis parse for Pegex::Miscellany(3pm) failed
mandb: warning: /usr/local/man/man3/Pegex::Overview.3pm: whatis parse for Pegex::Overview(3pm) failed
done.
Checking for stray cats under /usr/local/man...
Checking for stray cats under /var/cache/man/oldlocal...
84 man subdirectories contained newer manual pages.
10992 manual pages were added.
0 stray cats were added.

real 2m2.645s
user 1m58.135s
sys 0m48.983s
0


After rebuilding the man page database, there is no change in behaviour:



# man man || echo fail
#


What steps should I take next to fix or troubleshoot this problem?



Thank you!










share|improve this question






























    0















    I have an Ubuntu 18.04.2 LTS system that won't display man pages.



    # man man || echo fail
    #


    This AskUbuntu question suggests that I try running mandb -c.



    mandb -c runs to successful completion, but with some warnings:



    # time mandb -c; echo $?
    Processing manual pages under /usr/share/man...
    Updating index cache for path `/usr/share/man/man3'. Wait...mandb: warning: /usr/share/man/man3/pcredemo.3.gz: whatis parse for pcredemo(3) failed
    Updating index cache for path `/usr/share/man/man6'. Wait...done.
    Checking for stray cats under /usr/share/man...
    Checking for stray cats under /var/cache/man...
    Processing manual pages under /usr/share/man/de...
    Updating index cache for path `/usr/share/man/de/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/de...
    Checking for stray cats under /var/cache/man/de...
    Processing manual pages under /usr/share/man/fi...
    Updating index cache for path `/usr/share/man/fi/man1'. Wait...done.
    Checking for stray cats under /usr/share/man/fi...
    Checking for stray cats under /var/cache/man/fi...
    Processing manual pages under /usr/share/man/zh_CN...
    Updating index cache for path `/usr/share/man/zh_CN/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/zh_CN...
    Checking for stray cats under /var/cache/man/zh_CN...
    Processing manual pages under /usr/share/man/nl...
    Updating index cache for path `/usr/share/man/nl/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/nl...
    Checking for stray cats under /var/cache/man/nl...
    Processing manual pages under /usr/share/man/hu...
    Updating index cache for path `/usr/share/man/hu/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/hu...
    Checking for stray cats under /var/cache/man/hu...
    Processing manual pages under /usr/share/man/it...
    Updating index cache for path `/usr/share/man/it/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/it...
    Checking for stray cats under /var/cache/man/it...
    Processing manual pages under /usr/share/man/da...
    Updating index cache for path `/usr/share/man/da/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/da...
    Checking for stray cats under /var/cache/man/da...
    Processing manual pages under /usr/share/man/sv...
    Updating index cache for path `/usr/share/man/sv/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/sv...
    Checking for stray cats under /var/cache/man/sv...
    Processing manual pages under /usr/share/man/sr...
    Updating index cache for path `/usr/share/man/sr/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/sr...
    Checking for stray cats under /var/cache/man/sr...
    Processing manual pages under /usr/share/man/cs...
    Updating index cache for path `/usr/share/man/cs/man1'. Wait...mandb: warning: /usr/share/man/cs/man1/sensible-editor.1.gz: whatis parse for sensible-editor(1) failed
    Updating index cache for path `/usr/share/man/cs/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/cs...
    Checking for stray cats under /var/cache/man/cs...
    Processing manual pages under /usr/share/man/ja...
    Updating index cache for path `/usr/share/man/ja/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/ja...
    Checking for stray cats under /var/cache/man/ja...
    Processing manual pages under /usr/share/man/ko...
    Updating index cache for path `/usr/share/man/ko/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/ko...
    Checking for stray cats under /var/cache/man/ko...
    Processing manual pages under /usr/share/man/fr...
    Updating index cache for path `/usr/share/man/fr/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/fr...
    Checking for stray cats under /var/cache/man/fr...
    Processing manual pages under /usr/share/man/zh_TW...
    Updating index cache for path `/usr/share/man/zh_TW/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/zh_TW...
    Checking for stray cats under /var/cache/man/zh_TW...
    Processing manual pages under /usr/share/man/es...
    Updating index cache for path `/usr/share/man/es/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/es...
    Checking for stray cats under /var/cache/man/es...
    Processing manual pages under /usr/share/man/sl...
    Updating index cache for path `/usr/share/man/sl/man1'. Wait...done.
    Checking for stray cats under /usr/share/man/sl...
    Checking for stray cats under /var/cache/man/sl...
    Processing manual pages under /usr/share/man/pt...
    Updating index cache for path `/usr/share/man/pt/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/pt...
    Checking for stray cats under /var/cache/man/pt...
    Processing manual pages under /usr/share/man/pt_BR...
    Updating index cache for path `/usr/share/man/pt_BR/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/pt_BR...
    Checking for stray cats under /var/cache/man/pt_BR...
    Processing manual pages under /usr/share/man/ru...
    Updating index cache for path `/usr/share/man/ru/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/ru...
    Checking for stray cats under /var/cache/man/ru...
    Processing manual pages under /usr/share/man/pl...
    Updating index cache for path `/usr/share/man/pl/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/pl...
    Checking for stray cats under /var/cache/man/pl...
    Processing manual pages under /usr/share/man/id...
    Updating index cache for path `/usr/share/man/id/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/id...
    Checking for stray cats under /var/cache/man/id...
    Processing manual pages under /usr/share/man/tr...
    Updating index cache for path `/usr/share/man/tr/man5'. Wait...done.
    Checking for stray cats under /usr/share/man/tr...
    Checking for stray cats under /var/cache/man/tr...
    Processing manual pages under /usr/share/man/vi...
    Updating index cache for path `/usr/share/man/vi/man1'. Wait...done.
    Checking for stray cats under /usr/share/man/vi...
    Checking for stray cats under /var/cache/man/vi...
    Processing manual pages under /usr/local/man...
    Updating index cache for path `/usr/local/man/man3'. Wait...mandb: warning: /usr/local/man/man3/Pegex::API.3pm: whatis parse for Pegex::API(3pm) failed
    mandb: warning: /usr/local/man/man3/Pegex::Syntax.3pm: whatis parse for Pegex::Syntax(3pm) failed
    mandb: warning: /usr/local/man/man3/Pegex::Tutorial.3pm: whatis parse for Pegex::Tutorial(3pm) failed
    mandb: warning: /usr/local/man/man3/Pegex::Tutorial::Calculator.3pm: whatis parse for Pegex::Tutorial::Calculator(3pm) failed
    mandb: warning: /usr/local/man/man3/Pegex::Resources.3pm: whatis parse for Pegex::Resources(3pm) failed
    mandb: warning: /usr/local/man/man3/Pegex::Tutorial::JSON.3pm: whatis parse for Pegex::Tutorial::JSON(3pm) failed
    mandb: warning: /usr/local/man/man3/Pegex::Miscellany.3pm: whatis parse for Pegex::Miscellany(3pm) failed
    mandb: warning: /usr/local/man/man3/Pegex::Overview.3pm: whatis parse for Pegex::Overview(3pm) failed
    done.
    Checking for stray cats under /usr/local/man...
    Checking for stray cats under /var/cache/man/oldlocal...
    84 man subdirectories contained newer manual pages.
    10992 manual pages were added.
    0 stray cats were added.

    real 2m2.645s
    user 1m58.135s
    sys 0m48.983s
    0


    After rebuilding the man page database, there is no change in behaviour:



    # man man || echo fail
    #


    What steps should I take next to fix or troubleshoot this problem?



    Thank you!










    share|improve this question


























      0












      0








      0








      I have an Ubuntu 18.04.2 LTS system that won't display man pages.



      # man man || echo fail
      #


      This AskUbuntu question suggests that I try running mandb -c.



      mandb -c runs to successful completion, but with some warnings:



      # time mandb -c; echo $?
      Processing manual pages under /usr/share/man...
      Updating index cache for path `/usr/share/man/man3'. Wait...mandb: warning: /usr/share/man/man3/pcredemo.3.gz: whatis parse for pcredemo(3) failed
      Updating index cache for path `/usr/share/man/man6'. Wait...done.
      Checking for stray cats under /usr/share/man...
      Checking for stray cats under /var/cache/man...
      Processing manual pages under /usr/share/man/de...
      Updating index cache for path `/usr/share/man/de/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/de...
      Checking for stray cats under /var/cache/man/de...
      Processing manual pages under /usr/share/man/fi...
      Updating index cache for path `/usr/share/man/fi/man1'. Wait...done.
      Checking for stray cats under /usr/share/man/fi...
      Checking for stray cats under /var/cache/man/fi...
      Processing manual pages under /usr/share/man/zh_CN...
      Updating index cache for path `/usr/share/man/zh_CN/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/zh_CN...
      Checking for stray cats under /var/cache/man/zh_CN...
      Processing manual pages under /usr/share/man/nl...
      Updating index cache for path `/usr/share/man/nl/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/nl...
      Checking for stray cats under /var/cache/man/nl...
      Processing manual pages under /usr/share/man/hu...
      Updating index cache for path `/usr/share/man/hu/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/hu...
      Checking for stray cats under /var/cache/man/hu...
      Processing manual pages under /usr/share/man/it...
      Updating index cache for path `/usr/share/man/it/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/it...
      Checking for stray cats under /var/cache/man/it...
      Processing manual pages under /usr/share/man/da...
      Updating index cache for path `/usr/share/man/da/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/da...
      Checking for stray cats under /var/cache/man/da...
      Processing manual pages under /usr/share/man/sv...
      Updating index cache for path `/usr/share/man/sv/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/sv...
      Checking for stray cats under /var/cache/man/sv...
      Processing manual pages under /usr/share/man/sr...
      Updating index cache for path `/usr/share/man/sr/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/sr...
      Checking for stray cats under /var/cache/man/sr...
      Processing manual pages under /usr/share/man/cs...
      Updating index cache for path `/usr/share/man/cs/man1'. Wait...mandb: warning: /usr/share/man/cs/man1/sensible-editor.1.gz: whatis parse for sensible-editor(1) failed
      Updating index cache for path `/usr/share/man/cs/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/cs...
      Checking for stray cats under /var/cache/man/cs...
      Processing manual pages under /usr/share/man/ja...
      Updating index cache for path `/usr/share/man/ja/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/ja...
      Checking for stray cats under /var/cache/man/ja...
      Processing manual pages under /usr/share/man/ko...
      Updating index cache for path `/usr/share/man/ko/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/ko...
      Checking for stray cats under /var/cache/man/ko...
      Processing manual pages under /usr/share/man/fr...
      Updating index cache for path `/usr/share/man/fr/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/fr...
      Checking for stray cats under /var/cache/man/fr...
      Processing manual pages under /usr/share/man/zh_TW...
      Updating index cache for path `/usr/share/man/zh_TW/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/zh_TW...
      Checking for stray cats under /var/cache/man/zh_TW...
      Processing manual pages under /usr/share/man/es...
      Updating index cache for path `/usr/share/man/es/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/es...
      Checking for stray cats under /var/cache/man/es...
      Processing manual pages under /usr/share/man/sl...
      Updating index cache for path `/usr/share/man/sl/man1'. Wait...done.
      Checking for stray cats under /usr/share/man/sl...
      Checking for stray cats under /var/cache/man/sl...
      Processing manual pages under /usr/share/man/pt...
      Updating index cache for path `/usr/share/man/pt/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/pt...
      Checking for stray cats under /var/cache/man/pt...
      Processing manual pages under /usr/share/man/pt_BR...
      Updating index cache for path `/usr/share/man/pt_BR/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/pt_BR...
      Checking for stray cats under /var/cache/man/pt_BR...
      Processing manual pages under /usr/share/man/ru...
      Updating index cache for path `/usr/share/man/ru/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/ru...
      Checking for stray cats under /var/cache/man/ru...
      Processing manual pages under /usr/share/man/pl...
      Updating index cache for path `/usr/share/man/pl/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/pl...
      Checking for stray cats under /var/cache/man/pl...
      Processing manual pages under /usr/share/man/id...
      Updating index cache for path `/usr/share/man/id/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/id...
      Checking for stray cats under /var/cache/man/id...
      Processing manual pages under /usr/share/man/tr...
      Updating index cache for path `/usr/share/man/tr/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/tr...
      Checking for stray cats under /var/cache/man/tr...
      Processing manual pages under /usr/share/man/vi...
      Updating index cache for path `/usr/share/man/vi/man1'. Wait...done.
      Checking for stray cats under /usr/share/man/vi...
      Checking for stray cats under /var/cache/man/vi...
      Processing manual pages under /usr/local/man...
      Updating index cache for path `/usr/local/man/man3'. Wait...mandb: warning: /usr/local/man/man3/Pegex::API.3pm: whatis parse for Pegex::API(3pm) failed
      mandb: warning: /usr/local/man/man3/Pegex::Syntax.3pm: whatis parse for Pegex::Syntax(3pm) failed
      mandb: warning: /usr/local/man/man3/Pegex::Tutorial.3pm: whatis parse for Pegex::Tutorial(3pm) failed
      mandb: warning: /usr/local/man/man3/Pegex::Tutorial::Calculator.3pm: whatis parse for Pegex::Tutorial::Calculator(3pm) failed
      mandb: warning: /usr/local/man/man3/Pegex::Resources.3pm: whatis parse for Pegex::Resources(3pm) failed
      mandb: warning: /usr/local/man/man3/Pegex::Tutorial::JSON.3pm: whatis parse for Pegex::Tutorial::JSON(3pm) failed
      mandb: warning: /usr/local/man/man3/Pegex::Miscellany.3pm: whatis parse for Pegex::Miscellany(3pm) failed
      mandb: warning: /usr/local/man/man3/Pegex::Overview.3pm: whatis parse for Pegex::Overview(3pm) failed
      done.
      Checking for stray cats under /usr/local/man...
      Checking for stray cats under /var/cache/man/oldlocal...
      84 man subdirectories contained newer manual pages.
      10992 manual pages were added.
      0 stray cats were added.

      real 2m2.645s
      user 1m58.135s
      sys 0m48.983s
      0


      After rebuilding the man page database, there is no change in behaviour:



      # man man || echo fail
      #


      What steps should I take next to fix or troubleshoot this problem?



      Thank you!










      share|improve this question
















      I have an Ubuntu 18.04.2 LTS system that won't display man pages.



      # man man || echo fail
      #


      This AskUbuntu question suggests that I try running mandb -c.



      mandb -c runs to successful completion, but with some warnings:



      # time mandb -c; echo $?
      Processing manual pages under /usr/share/man...
      Updating index cache for path `/usr/share/man/man3'. Wait...mandb: warning: /usr/share/man/man3/pcredemo.3.gz: whatis parse for pcredemo(3) failed
      Updating index cache for path `/usr/share/man/man6'. Wait...done.
      Checking for stray cats under /usr/share/man...
      Checking for stray cats under /var/cache/man...
      Processing manual pages under /usr/share/man/de...
      Updating index cache for path `/usr/share/man/de/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/de...
      Checking for stray cats under /var/cache/man/de...
      Processing manual pages under /usr/share/man/fi...
      Updating index cache for path `/usr/share/man/fi/man1'. Wait...done.
      Checking for stray cats under /usr/share/man/fi...
      Checking for stray cats under /var/cache/man/fi...
      Processing manual pages under /usr/share/man/zh_CN...
      Updating index cache for path `/usr/share/man/zh_CN/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/zh_CN...
      Checking for stray cats under /var/cache/man/zh_CN...
      Processing manual pages under /usr/share/man/nl...
      Updating index cache for path `/usr/share/man/nl/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/nl...
      Checking for stray cats under /var/cache/man/nl...
      Processing manual pages under /usr/share/man/hu...
      Updating index cache for path `/usr/share/man/hu/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/hu...
      Checking for stray cats under /var/cache/man/hu...
      Processing manual pages under /usr/share/man/it...
      Updating index cache for path `/usr/share/man/it/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/it...
      Checking for stray cats under /var/cache/man/it...
      Processing manual pages under /usr/share/man/da...
      Updating index cache for path `/usr/share/man/da/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/da...
      Checking for stray cats under /var/cache/man/da...
      Processing manual pages under /usr/share/man/sv...
      Updating index cache for path `/usr/share/man/sv/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/sv...
      Checking for stray cats under /var/cache/man/sv...
      Processing manual pages under /usr/share/man/sr...
      Updating index cache for path `/usr/share/man/sr/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/sr...
      Checking for stray cats under /var/cache/man/sr...
      Processing manual pages under /usr/share/man/cs...
      Updating index cache for path `/usr/share/man/cs/man1'. Wait...mandb: warning: /usr/share/man/cs/man1/sensible-editor.1.gz: whatis parse for sensible-editor(1) failed
      Updating index cache for path `/usr/share/man/cs/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/cs...
      Checking for stray cats under /var/cache/man/cs...
      Processing manual pages under /usr/share/man/ja...
      Updating index cache for path `/usr/share/man/ja/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/ja...
      Checking for stray cats under /var/cache/man/ja...
      Processing manual pages under /usr/share/man/ko...
      Updating index cache for path `/usr/share/man/ko/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/ko...
      Checking for stray cats under /var/cache/man/ko...
      Processing manual pages under /usr/share/man/fr...
      Updating index cache for path `/usr/share/man/fr/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/fr...
      Checking for stray cats under /var/cache/man/fr...
      Processing manual pages under /usr/share/man/zh_TW...
      Updating index cache for path `/usr/share/man/zh_TW/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/zh_TW...
      Checking for stray cats under /var/cache/man/zh_TW...
      Processing manual pages under /usr/share/man/es...
      Updating index cache for path `/usr/share/man/es/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/es...
      Checking for stray cats under /var/cache/man/es...
      Processing manual pages under /usr/share/man/sl...
      Updating index cache for path `/usr/share/man/sl/man1'. Wait...done.
      Checking for stray cats under /usr/share/man/sl...
      Checking for stray cats under /var/cache/man/sl...
      Processing manual pages under /usr/share/man/pt...
      Updating index cache for path `/usr/share/man/pt/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/pt...
      Checking for stray cats under /var/cache/man/pt...
      Processing manual pages under /usr/share/man/pt_BR...
      Updating index cache for path `/usr/share/man/pt_BR/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/pt_BR...
      Checking for stray cats under /var/cache/man/pt_BR...
      Processing manual pages under /usr/share/man/ru...
      Updating index cache for path `/usr/share/man/ru/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/ru...
      Checking for stray cats under /var/cache/man/ru...
      Processing manual pages under /usr/share/man/pl...
      Updating index cache for path `/usr/share/man/pl/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/pl...
      Checking for stray cats under /var/cache/man/pl...
      Processing manual pages under /usr/share/man/id...
      Updating index cache for path `/usr/share/man/id/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/id...
      Checking for stray cats under /var/cache/man/id...
      Processing manual pages under /usr/share/man/tr...
      Updating index cache for path `/usr/share/man/tr/man5'. Wait...done.
      Checking for stray cats under /usr/share/man/tr...
      Checking for stray cats under /var/cache/man/tr...
      Processing manual pages under /usr/share/man/vi...
      Updating index cache for path `/usr/share/man/vi/man1'. Wait...done.
      Checking for stray cats under /usr/share/man/vi...
      Checking for stray cats under /var/cache/man/vi...
      Processing manual pages under /usr/local/man...
      Updating index cache for path `/usr/local/man/man3'. Wait...mandb: warning: /usr/local/man/man3/Pegex::API.3pm: whatis parse for Pegex::API(3pm) failed
      mandb: warning: /usr/local/man/man3/Pegex::Syntax.3pm: whatis parse for Pegex::Syntax(3pm) failed
      mandb: warning: /usr/local/man/man3/Pegex::Tutorial.3pm: whatis parse for Pegex::Tutorial(3pm) failed
      mandb: warning: /usr/local/man/man3/Pegex::Tutorial::Calculator.3pm: whatis parse for Pegex::Tutorial::Calculator(3pm) failed
      mandb: warning: /usr/local/man/man3/Pegex::Resources.3pm: whatis parse for Pegex::Resources(3pm) failed
      mandb: warning: /usr/local/man/man3/Pegex::Tutorial::JSON.3pm: whatis parse for Pegex::Tutorial::JSON(3pm) failed
      mandb: warning: /usr/local/man/man3/Pegex::Miscellany.3pm: whatis parse for Pegex::Miscellany(3pm) failed
      mandb: warning: /usr/local/man/man3/Pegex::Overview.3pm: whatis parse for Pegex::Overview(3pm) failed
      done.
      Checking for stray cats under /usr/local/man...
      Checking for stray cats under /var/cache/man/oldlocal...
      84 man subdirectories contained newer manual pages.
      10992 manual pages were added.
      0 stray cats were added.

      real 2m2.645s
      user 1m58.135s
      sys 0m48.983s
      0


      After rebuilding the man page database, there is no change in behaviour:



      # man man || echo fail
      #


      What steps should I take next to fix or troubleshoot this problem?



      Thank you!







      manpage






      share|improve this question















      share|improve this question













      share|improve this question




      share|improve this question








      edited 6 mins ago







      Jim L.

















      asked 11 mins ago









      Jim L.Jim L.

      1111




      1111




















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