66 lines
1.8 KiB
Markdown
66 lines
1.8 KiB
Markdown
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---
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tags: [shell, procedural]
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created: Tuesday, March 04, 2025
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---
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# lsof
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`lsof` stands for _list open files_. It lists opened files and the processes
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using them.
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## Directory
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```sh
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lsof /home/thomas
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```
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```
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COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
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pipewire 1025 thomas cwd DIR 253,0 4096 7340035 /home/thomas
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wireplumb 1026 thomas cwd DIR 253,0 4096 7340035 /home/thomas
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```
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## Pass in a pid
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```sh
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lsof -p 1175
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```
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```
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COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
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at-spi-bu 1175 thomas cwd DIR 253,0 4096 7340035 /home/thomas
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at-spi-bu 1175 thomas rtd DIR 259,2 4096 2 /
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at-spi-bu 1175 thomas txt REG 259,2 26760 1225154 /usr/lib/at-spi-bus-launcher
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```
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## Networking
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### List programs using or listening to ports
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```sh
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lsof -i
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```
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```
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COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
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signal-de 3250 thomas 39u IPv4 149863 0t0 TCP archlinux:44304->ac88393aca5853df7.awsglobalaccelerator.com:https (ESTABLISHED)
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slack 3602 thomas 18u IPv4 138442 0t0 TCP archlinux:57950->ec2-18-169-55-40.eu-west-2.compute.amazonaws.com:https (ESTABLISHED)
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firefox 6177 thomas 147u IPv4 138842 0t0 TCP archlinux:cresco-control->93.243.107.34.bc.googleusercontent.com:https (ESTABLISHED)
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```
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### Filter by specific port
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```sh
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lsof -i:22
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lsof -i4:22 # limit to IPv4 addresses
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```
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```
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COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
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sshd 45448 root 3u IPv4 640237 0t0 TCP *:ssh (LISTEN)
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sshd 45448 root 4u IPv6 640239 0t0 TCP *:ssh (LISTEN)
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sshd 185660 root 4u IPv4 2554538 0t0 TCP static.18.113.203.116.clients.your-server.de:ssh->0542cb12.skybroadband.com:57744 (ESTABLISHED)
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```
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