Who holds a file before umount lsof

Free a stuck port lsof -t -i:<port> | xargs -r kill Detect CLOSE_WAIT leaks lsof -nP -i -sTCP:CLOSE_WAIT Connections to remote host lsof -nP -i @<host>:<port> Binaries and libs of a PID lsof -p <pid> -a -d txt,mem Count open fds of a PID lsof -nP -p <pid> | wc -l