BEAUTY AND PLAY
$p Display all 428 possibilities? (y or n) $p bash: p: command not found $cat .inputrc set show-all-if-ambiguous on $ related text: Specifies the duration Readline will wait for a character when reading an ambiguous key sequence (one that can form a complete key sequence using the input read so far, or can take additional …
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$ls 1 $( ls date ) ls: cannot access date: No such file or directory $( `ls` date ) bash: 1: command not found $cat 1 B$ $( ls `date` ) ls: cannot access Mon: No such file or directory ls: cannot access Feb: No such file or directory ls: cannot access 22: No such …
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$echo $BASH /bin/bash $echo $BASH_ $echo $BASH_v $echo $BASH_VERSION 4.3.42(1)-release $date || time Sun Feb 21 23:15:50 IST 2016 $datei || time bash: datei: command not found real 0m0.000s user 0m0.000s sys 0m0.000s $dateno || time bash: dateno: command not found real 0m0.000s user 0m0.000s sys 0m0.000s $time || date bash: syntax error near unexpected …
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$builtin echo jeffrin jeffrin $echo jeffrin jeffrin $echo() { echo “hi”; }; $echo jeffrin ^C $builtin echo jeffrin jeffrin $echo jeffrin ^C $ https://en.wikipedia.org/wiki/Shell_builtin http://unix.stackexchange.com/questions/11454/what-is-the- difference-between-a-builtin-command-and-one-that-is-not (jeffrin) what is the use of the command named “builtin” (jeffrin) llua : hello (llua) to avoid a possible wrapper
$tsort 1 tsort: -: input contains an odd number of tokens $tsort 1 2 1 2 $tsort 0 1 2 3 4 5 0 2 4 1 3 5 $tsort 0 1 2 3 4 5 0 2 4 1 3 5 $ http://www.geeksforgeeks.org/topological-sorting/ https://www.quora.com/What-are-some-real-world-applications-of-topological-sort