SED Ajouter un mot au début de la ligne
$ sed 's/^/#/' file.txt
#add
#character
#at the
#beginning of
#each line
Ugliest Unicorn
$ sed 's/^/#/' file.txt
#add
#character
#at the
#beginning of
#each line
sed 's/.*/&:80/' abcd.txt >abcde.txt