i don't understand what's the meaning of the -a in dpkg --configure -a and what's the meaning of the -y is apt -y install ? , i always find-letters that i never understand what's there meaning , can any one share with me a link of a dictionary that explain them that would be great . also if any of you read the hacker playbook 2 i could use some constant help pls , i have so many questions about it . thanks for your help.
1 Answer
Virtually all commands, especially those designed for command-line use, have a manual page. For a command cmd
this is displayed in a command shell by typing man cmd
. There you can read about all command line switches and their parameters. You find the official manual pages online at die.net or at man7.org and at various other sites.
Moreover, most commands can be queried for a brief usage description by cmd -?
, those that require parameters often display it when typing cmd
, some commands give a more verbose description on cmd --help
(sometimes cmd -help
or cmd -h
).
man dpkg
to know about dpkg options. Useman apt
to know about apt options.