# Efficient Linux at the Command Line

By [differui](https://paragraph.com/@binrui) · 2023-03-15

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Combining Commands
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    # cut as fragments and retrive the second fragment
    cut -f2 something.txt
    
    # cut by delimiter , and retrive the first fragment
    cut -d, -f1
    
    # print deplicate files
    md5 *.png  | cut -d= -f2 | uniq -c | sort -nr | grep -v " 1"
    

Introducing the Shell
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    # disable $, print verbatim
    echo '$HOME'
    
    # $ is working
    echo "$HOME"
    

Rerunning Commands
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    # the final word
    command !$
    
    # the final arguments
    command !*
    
    # patch on previous command
    ^original^replacement
    
    # edit in vim mode
    set -o vim
    

Cruising the Filesystem
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*Originally published on [differui](https://paragraph.com/@binrui/efficient-linux-at-the-command-line)*