Command for checking opened files?

[new2unix]

Hi,

Is there an AIX command used to check for the total number of file (or filehandle?) currently opened? And is there a limit set some where in the OS to limit the number of file that can be opened?

Thanks,

Mike

 

[vgersh99]

man lsof [at least under Solaris] Vlad
+---------------------------+
|#include<disclaimer.h> |
+---------------------------+

 

[new2unix]

Vlad,

I checked for this command and it's not available on my AIX server.

Thanks,

Mike

 

[dchoulette]

The following works on HP-UX and Solaris in a sh shell.

To get the current system or process limits try
ulimit -a
and check for the line:
nofiles (descriptors)

This show you the soft limits. To see the hard limits (the ones you can excess) try:
ulimit -Ha

You can always lower a limit. With sufficient privilege you can raise a limit.
For example:
ulimit -Sn 256
set the S(oft) n(ofiles) limit to 256.

The change of limit is valid for the shell and each of its childs.

 

[Avardan]

Try fuser

 

[misercord]

You can get lsof at:

http://www.bullfreeware.com/

It will list all open files. Since most everything in UNIX is a file it can do a lot. For example it can tell you about open sockets. I am pretty sure fuser can't do that.

 

[Required]

I'd recommend to download lsof from ftp://vic.cc.purdue.edu/pub/tools/unix/lsof/lsof.tar.gz
or ftp://vic.cc.purdue.edu/pub/tools/unix/lsof/lsof.tar.Z
so you are sure to get the latest version directly from the source.

 

[dendenners]

Avardan is right in saying fuser is worth a look.
'fuser -c /' should give you a list of all pids which have open files.

 

[dendenners]

just to put flesh on the bones of the last post;
fuser -c / | wc | awk '{ NR==2; print $2 }' | read ret_val
will put the # of files opened by other processes in the / filesystem into $ret_val