Ubuntu-Linux Command Line

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To open a PDF file,type

$ gnome-open abc.pdf

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How to send a message to another user

To send a message to another user logged in the system,type $ write username (your message) ctrl+d
How to print the user id, group id, effective id and the supplementary groups

To print the user id (uid) and group id (gid), effective id (if different than the real id) and the supplementary groups. $ id userna...
Clear terminal screen

To clear terminal screen ~ $ clear
How to Backup and Restore your Ubuntu system using GUI application

To Backup and Restore your Ubuntu system, there is a GUI application called deja-dup .
How to show the details of hardware system components

To show the details of hardware system components,type $ dmidecode -q * Dmidecode means DMI table decoder. It contains a description ...

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