will output a nicely formatted list of all users to “users_all.txt” but also print on screen (tee)
(for whatever reason the current date-time is at the very top)
cut -d: -f1 /etc/passwd|sort|pr -1 |grep -v '^$'|tee users_all.txt
what has been done?
cut -d: -f1 /etc/passwd # get first column (-f1) from the semicolon:(-d:):separated:file /etc/passwd
sort # sort alphabetically
pr -2 # display as two columns list, also responsible for printing the current date-and-time
grep -v ‘^$’ # remove all empty lines
tee userliste # output the result to file and screen
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