For, break, continue, exit

If followed by a command
If rpm-q gcc & ID Tom | echo "Sss"; & if the preceding command is successfully executed, run &
Otherwise, execute | the following command

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For is calculated once with a space or press Enter.
For I in Tom Jerry do
For I in *. Sh
{1 .. 10} is equivalent to 1 2 3 4 5 6 7 8 9 10
For I in {1 .. 10}
SEQ-W 10 equal width 09 10
SEQ 2 2 10 get a number from 2 to 10 every other
For I in '<file 'do
For (I = 0; I <10; I ++ ))
#--------------------------------------------------------
While (I <= 10); do
While true do a = "" While [$ A]; do is equivalent to while [-N $ A] do while [1] d
O endless loop
Cat file | while read a B C; do assigns values to parameters (separated by spaces) each time a file is read.

Case "$ C" in
10 | 20 | 30)

;;

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This article from the "Love armed for a lifetime" blog, please be sure to keep this source http://menglinux.blog.51cto.com/8733806/1437316