sed add word to beginning of line
$ sed 's/^/#/' file.txt
#add
#character
#at the
#beginning of
#each linesed add word to beginning of line
$ sed 's/^/#/' file.txt
#add
#character
#at the
#beginning of
#each linesed add word to end of line
sed 's/.*/&:80/' abcd.txt >abcde.txtCopyright © 2021 Codeinu
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