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Bash - last command args shortcut
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| $ echo a b c d | |
| a b c d | |
| # PCA. - meaning previous command argument | |
| $ echo !* ; # !* is all PCA == echo a b c d | |
| a b c d | |
| $ echo !^ ; # !^ is first PCA == echo a | |
| a | |
| $ echo !$ ; # !$ is last PCA == echo d | |
| d | |
| $ echo !:2 ; # !:N is N'th PCA ie. !:2 == echo b | |
| b |
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