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sort

Sort lines of text files.

Sort a file in ascending order:

sort {{filename}}

Sort a file in descending order:

sort -r {{filename}}

Sort a file in case-insensitive way:

sort --ignore-case {{filename}}

Sort a file using numeric rather than alphabetic order:

sort -n {{filename}}

Sort the passwd file by the 3rd field, numerically:

sort -t: -k 3n /etc/passwd

Sort a file preserving only unique lines:

sort -u {{filename}}

Sort human-readable numbers (in this case the 5th field of ls -lh):

ls -lh | sort -h -k 5