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Linux

Lsof

Linux

Show process that use internet connection at the moment
lsof -P -i -n
Show process that use specific port number
lsof -i tcp:443
Lists all listening ports together with the PID of the associated process
lsof -Pan -i tcp -i udp
List all open ports and their owning executables
lsof -i -P | grep -i "listen"
Show all open ports
lsof -Pnl -i
Show open ports (LISTEN)
lsof -Pni4 | grep LISTEN | column -t
List all files opened by a particular command
lsof -c "process"
View user activity per directory
lsof -u username -a +D /etc
Show 10 largest open files
lsof / | \
awk '{ if($7 > 1048576) print $7/1048576 "MB" " " $9 " " $1 }' | \
sort -n -u | tail | column -t
Show current working directory of a process
lsof -p <PID> | grep cwd

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Show process that use internet connection at the momentShow process that use specific port numberLists all listening ports together with the PID of the associated processList all open ports and their owning executablesShow all open portsShow open ports (LISTEN)List all files opened by a particular commandView user activity per directoryShow 10 largest open filesShow current working directory of a process
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