Difference between revisions of "Lsof"
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| − | [[lsof]] is a [[command]] to list open files on your system. This can help you to find out which application is blocking | + | [[lsof]] is a [[command]] to list open files on your system. Files can be normal files, pipes, sockets and device files. This can help you to find out which application is blocking your CD ROM drive so it does not eject. It is also possible to show processes that have a [[network]] socket open using lsof -i. |
= Examples = | = Examples = | ||
* Show which process is blocking your soundcard: | * Show which process is blocking your soundcard: | ||
| − | lsof | grep dsp | + | lsof [[piping||]] [[grep]] dsp |
* Show which process listens on your smtp port | * Show which process listens on your smtp port | ||
tweedleburg:~/Downloads # lsof -i [[piping||]] [[grep]] smtp | tweedleburg:~/Downloads # lsof -i [[piping||]] [[grep]] smtp | ||
master 3320 root 12u IPv4 9503 0t0 TCP localhost:smtp (LISTEN) | master 3320 root 12u IPv4 9503 0t0 TCP localhost:smtp (LISTEN) | ||
master 3320 root 13u IPv6 9505 0t0 TCP localhost:smtp (LISTEN) | master 3320 root 13u IPv6 9505 0t0 TCP localhost:smtp (LISTEN) | ||
| + | |||
| + | = Headings = | ||
| + | # lsof <abbr title="print 15 characters of the UNIX command name">+c 15</abbr> | ||
| + | COMMAND PID TID USER FD TYPE DEVICE SIZE/OFF NODE NAME | ||
| + | [...] | ||
| + | <abbr title="Note this is not a thread so TID is empty">speaker-test 3156 </abbr> root 5r FIFO 0,8 0t0 19532 pipe | ||
| + | speaker-test 3156 root 6w FIFO 0,8 0t0 19532 pipe | ||
| + | threaded-ml 3156 3157 root 5r FIFO 0,8 0t0 19532 pipe | ||
| + | threaded-ml 3156 3157 root 6w FIFO 0,8 0t0 19532 pipe | ||
= See also = | = See also = | ||
| − | * [http:// | + | * [http://www.manpagez.com/man/8/lsof/ man page] |
| − | * [[netstat]] | + | * [[strace]] |
| + | * [[netstat]] - similar to lsof -i | ||
* [[nmap]] | * [[nmap]] | ||
* [[telnet]] | * [[telnet]] | ||
| + | |||
| + | [[Category:Networking]] | ||
| + | [[Category:Analysis]] | ||
| + | [[Category:Command]] | ||
Latest revision as of 15:19, 4 April 2015
lsof is a command to list open files on your system. Files can be normal files, pipes, sockets and device files. This can help you to find out which application is blocking your CD ROM drive so it does not eject. It is also possible to show processes that have a network socket open using lsof -i.
Examples
- Show which process is blocking your soundcard:
lsof | grep dsp
- Show which process listens on your smtp port
tweedleburg:~/Downloads # lsof -i | grep smtp master 3320 root 12u IPv4 9503 0t0 TCP localhost:smtp (LISTEN) master 3320 root 13u IPv6 9505 0t0 TCP localhost:smtp (LISTEN)
Headings
# lsof +c 15 COMMAND PID TID USER FD TYPE DEVICE SIZE/OFF NODE NAME [...] speaker-test 3156 root 5r FIFO 0,8 0t0 19532 pipe speaker-test 3156 root 6w FIFO 0,8 0t0 19532 pipe threaded-ml 3156 3157 root 5r FIFO 0,8 0t0 19532 pipe threaded-ml 3156 3157 root 6w FIFO 0,8 0t0 19532 pipe
