lsof_general []

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Opened files - directories

lsof /var/log/httpd/

Opened files - processes

lsof -c ssh

Opened files - device busy

“Device or Resource Busy” Error - we need to find out what are all the processes using the mount point and kill those processes to umount the directory.
By using lsof we can find those processes.

lsof /home

Opened files - specific users

lsof -u luke

Opened files - specific process

lsof -p 1234