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Use ZSH instead of bash, typing .. will move you up one directory, without the need to alias it.
There are 4 alternatives - vote for the best!
In bash, this turns on auto cd. If a command is just a directory name, it cd's into that directory.
Alias two dots to move to parent directory. Put it into your .bashrc or .profile file.
Alias a single character 'b' to move to parent directory. Put it into your .bashrc or .profile file.
Using "cd .." is one of the most repetitive sequence of characters you'll in the command line. Bring it down to two keys 'b' and 'enter'.
It stands for "back"
Also useful to have multiple:
alias b='cd ../'
alias bb='cd ../../'
alias bbb='cd ../../../'
alias bbbb='cd ../../../../'
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