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man command not working in Ubuntu 18.04

ubuntu man command display blank pagesCannot upgrade UbuntuUnbuffer stopped working months agoUbuntu 18.04 update issuegrub-efi-amd64-signed update issueRandom freezes in (X)Ubuntu 18.04 caused by filled up RAM

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margin-bottom:0;

2

My man command is not working at all on my Ubuntu 18.04 machine. Unlike most of the cases I have found described in the internet, where there is an error message after calling man, I do not get any output/ error message at all

If I type which man

I will get /usr/bin/man. And I have checked with echo PATH that/usr/bin is on my PATH.

I have already tried sudo apt install --reinstall man-db, restarted the terminal, but no success.

Does anyone know what the problem can be?

18.04 manpage

share|improve this question

asked Nov 21 '18 at 9:30

BCArgBCArg

23744 silver badges1212 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What do you get if you try whereis man ? This should provide any locations for man, plus the locations for the manual pages (for the command man)
  
  – guiverc
  Nov 21 '18 at 9:54
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I get man: /usr/bin/man /usr/local/man /usr/share/man /usr/share/man/man1/man.1.gz /usr/share/man/man7/man.7.gz None of them work by calling man with the full path (some are directories). But the which command will tell me which man linux will call when calling man, right? As I described in my question it is /usr/bin/man, which is in my $PATH
  
  – BCArg
  Nov 21 '18 at 10:02
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  maybe you can run strace man and then paste the debug info in some nopaste site?(since the info would be long)
  
  – Alvin Liang
  Nov 21 '18 at 10:12
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I would check you have some free disk space (df -h) in case it needs it to operate. Next I would dpkg -S /usr/bin/man to ensure your found program comes from man-db (as expected). I'm not sure what you mean by "calling man with the full path" as to access page 1 you man 1 man, to access page 7 man 7 man (which doesn't use the path; unless you meant /usr/bin/man 1 man to view page 1). If you check file type of your binary (ie. file /usr/bin/man) do you get a ELF LSB shared object dyn.linked of correct architecture?
  
  – guiverc
  Nov 21 '18 at 10:52
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  To answer your comments: 1. space should not be a problem, 2. calling man with the full path I mean typing /usr/bin/man instead of just man. But, again, this does not work either. 3. the output of file /usr/bin/man is ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=c80771d215f4d9df4bf138ec9cfbf23bc58c950d, stripped
  
  – BCArg
  Nov 21 '18 at 11:24
  
  

  
  
  
  

 | 
show 1 more comment

2

My man command is not working at all on my Ubuntu 18.04 machine. Unlike most of the cases I have found described in the internet, where there is an error message after calling man, I do not get any output/ error message at all

If I type which man

I will get /usr/bin/man. And I have checked with echo PATH that/usr/bin is on my PATH.

I have already tried sudo apt install --reinstall man-db, restarted the terminal, but no success.

Does anyone know what the problem can be?

18.04 manpage

share|improve this question

asked Nov 21 '18 at 9:30

BCArgBCArg

23744 silver badges1212 bronze badges

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  What do you get if you try whereis man ? This should provide any locations for man, plus the locations for the manual pages (for the command man)
  
  – guiverc
  Nov 21 '18 at 9:54
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I get man: /usr/bin/man /usr/local/man /usr/share/man /usr/share/man/man1/man.1.gz /usr/share/man/man7/man.7.gz None of them work by calling man with the full path (some are directories). But the which command will tell me which man linux will call when calling man, right? As I described in my question it is /usr/bin/man, which is in my $PATH
  
  – BCArg
  Nov 21 '18 at 10:02
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  maybe you can run strace man and then paste the debug info in some nopaste site?(since the info would be long)
  
  – Alvin Liang
  Nov 21 '18 at 10:12
  
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  I would check you have some free disk space (df -h) in case it needs it to operate. Next I would dpkg -S /usr/bin/man to ensure your found program comes from man-db (as expected). I'm not sure what you mean by "calling man with the full path" as to access page 1 you man 1 man, to access page 7 man 7 man (which doesn't use the path; unless you meant /usr/bin/man 1 man to view page 1). If you check file type of your binary (ie. file /usr/bin/man) do you get a ELF LSB shared object dyn.linked of correct architecture?
  
  – guiverc
  Nov 21 '18 at 10:52
  

  
  
  
  


• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  To answer your comments: 1. space should not be a problem, 2. calling man with the full path I mean typing /usr/bin/man instead of just man. But, again, this does not work either. 3. the output of file /usr/bin/man is ELF 64-bit LSB shared object, x86-64, version 1 (SYSV), dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, for GNU/Linux 3.2.0, BuildID[sha1]=c80771d215f4d9df4bf138ec9cfbf23bc58c950d, stripped
  
  – BCArg
  Nov 21 '18 at 11:24
  
  

  
  
  
  

 | 
show 1 more comment

My man command is not working at all on my Ubuntu 18.04 machine. Unlike most of the cases I have found described in the internet, where there is an error message after calling man, I do not get any output/ error message at all

If I type which man

I will get /usr/bin/man. And I have checked with echo PATH that/usr/bin is on my PATH.

I have already tried sudo apt install --reinstall man-db, restarted the terminal, but no success.

Does anyone know what the problem can be?

18.04 manpage

share|improve this question

asked Nov 21 '18 at 9:30

BCArgBCArg

23744 silver badges1212 bronze badges

share|improve this question

asked Nov 21 '18 at 9:30

BCArgBCArg

23744 silver badges1212 bronze badges

share|improve this question

asked Nov 21 '18 at 9:30

BCArgBCArg

23744 silver badges1212 bronze badges

asked Nov 21 '18 at 9:30

BCArgBCArg

23744 silver badges1212 bronze badges

asked Nov 21 '18 at 9:30

BCArgBCArg

23744 silver badges1212 bronze badges

1 Answer
1

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oldest

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1

I had the same problem and I solved it by running the following command:

sudo man <command>

share|improve this answer

edited Apr 29 at 20:59

Kevin Bowen

16k1515 gold badges6262 silver badges7373 bronze badges

answered Apr 29 at 18:23

Gonzalo Garcia GentaGonzalo Garcia Genta

1111 bronze badge

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It works, but why does it only work with sudo?
  
  – wordsforthewise
  May 8 at 22:10
  

  
  
  
  

add a comment
 | 

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1

I had the same problem and I solved it by running the following command:

sudo man <command>

share|improve this answer

edited Apr 29 at 20:59

Kevin Bowen

16k1515 gold badges6262 silver badges7373 bronze badges

answered Apr 29 at 18:23

Gonzalo Garcia GentaGonzalo Garcia Genta

1111 bronze badge

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It works, but why does it only work with sudo?
  
  – wordsforthewise
  May 8 at 22:10
  

  
  
  
  

add a comment
 | 

1

I had the same problem and I solved it by running the following command:

sudo man <command>

share|improve this answer

edited Apr 29 at 20:59

Kevin Bowen

16k1515 gold badges6262 silver badges7373 bronze badges

answered Apr 29 at 18:23

Gonzalo Garcia GentaGonzalo Garcia Genta

1111 bronze badge

• 
  
  
  

  
  

  
  
  
  
  
  

  
  
  It works, but why does it only work with sudo?
  
  – wordsforthewise
  May 8 at 22:10
  

  
  
  
  

add a comment
 | 

I had the same problem and I solved it by running the following command:

sudo man <command>

share|improve this answer

edited Apr 29 at 20:59

Kevin Bowen

16k1515 gold badges6262 silver badges7373 bronze badges

answered Apr 29 at 18:23

Gonzalo Garcia GentaGonzalo Garcia Genta

1111 bronze badge

sudo man <command>

share|improve this answer

edited Apr 29 at 20:59

Kevin Bowen

16k1515 gold badges6262 silver badges7373 bronze badges

answered Apr 29 at 18:23

Gonzalo Garcia GentaGonzalo Garcia Genta

1111 bronze badge

edited Apr 29 at 20:59

Kevin Bowen

16k1515 gold badges6262 silver badges7373 bronze badges

edited Apr 29 at 20:59

Kevin Bowen

16k1515 gold badges6262 silver badges7373 bronze badges

answered Apr 29 at 18:23

Gonzalo Garcia GentaGonzalo Garcia Genta

1111 bronze badge

answered Apr 29 at 18:23

Gonzalo Garcia GentaGonzalo Garcia Genta

1111 bronze badge