commandline session $who jeffrin tty7 2014-03-30 00:04 (:0) jeffrin pts/0 2014-03-30 00:06 (:0) $’who’ jeffrin tty7 2014-03-30 00:04 (:0) jeffrin pts/0 2014-03-30 00:06 (:0) $`who` bash: jeffrin: command not found $ls -a > a.txt $ls -A > A.txt $diff a.txt A.txt 1,2d0 < . A.txt $cmp a.txt A.txt a.txt A.txt differ: byte 1, line 1 …
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