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Technology quick references, cheatsheets, user manuals etc.

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Tutorials on various IT applications.

Examples of how to use for

(1) Process files that match a wildcard

e.g. count the number of lines for each file that starts with q

# for f in `ls -1 q*`;do wc -l $f;done;

# for f in q*; do wc -l $f;done;

(2) Run some command using a loop counter. In this case for every count, we run echo $i and then sleep for 5 seconds.

# for i in {1..10};do echo $i;sleep 5;done;