Bang Bang
10 May 2013 in Tech
Two quick terminal input manipulation commands today. The first is bangbang (!!
). !!
is a shortcut that means "substitute this with the last command run". It's most commonly used when you forget to sudo
a command.
bash
E: Could not open lock file /var/lib/dpkg/lock -open (13: Permission denied)E: Unable to lock the administration directory (/var/lib/dpkg/),are you root?sudo apt-get install tmux[sudo] password for vagrant:
If you want to make sure the command is right before executing it, you can add :p
to the end to say "print this" instead of "execute this".
bash
sudo apt-get install tmux
Then you can hit the up arrow and enter to run the command.
If you want a bit more versatility, you can use ^caret^substitution
. This means "find this first string in the last command, replace it with the second one and run the command again".
bash
Reading package lists... DoneBuilding dependency treeReading state information... DoneE: Unable to locate package tumxsudo apt-get install tmuxReading package lists... Done