Recipe: Concatenate with cat


cat
===
$ cat file1 file2 file3 ..
# Provides concatenation of many files provided in argument as output


$ echo 'Text through stdin' | cat - file
# - acts as filename for stdin text

Squeeze blank
=============
$ cat -s file

$ cat file | tr -s '\n'

Display tab
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$ cat -T file.py

Line numbers
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$ cat -n file.txt