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The output of your command "$ w" is:

 09:46:37 up 4 days, 12:54,  1 user,  load average: 0.06, 0.05, 0.01
USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU  WHAT
wahid    tty2     -                Mon21    3days  0.27s  0.19s /usr/libexec/gnome-session-binary --session=ubuntu