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The output of your command "$ w -s" is:

 15:31:16 up 12 days,  4:08,  2 users,  load average: 0.01, 0.04, 0.04
USER     TTY      FROM               IDLE WHAT
wahid             192.168.254.125  42:53m sshd: wahid [priv]
gdm      tty1     -                 1:29m /usr/bin/gjs -m /usr/share/gnome-shell/org.gnome.ScreenSaver