lsof vs fuser

[chakri]

Which command is best to find if the file is still open?? lsof or fuser. which command will take more cpu??

[Ivan Ferreira · Accepted solution]

About cpu usage for sure lsof, but is really great.

Last time I had a problem with a file system near full. But if you do du over the file system, the information does not match. The problem was a file already deleted, but not released by the process.

I have a "screenshow" of that!!!

COMMAND PID USER FD TYPE DEVICE SIZE NODE NAME
java 7699 oas 22u REG 253,1 856117248 59 /tmp/dat000407699 (deleted)

800 MB in a "ghost" file was found with lsof.

[chakri]

thank you

[Stuart Browne]

It depends on what information you want to get.

As for how much CPU, we're talking milliseconds of difference in favour of fuser.

Now, regarding usefulness, I'm an lsof fan, no question.

But as I said, it depends on what information you want.

[dirk dierickx]

wow, who cares about the cpu usage of such a tool, unless you want to put it in cron and run it every 2 minutes it doesn't matter!