Shell for循环

for循环的基本语法

for VAR in item1 item2 ... itemN
do
  command1
  command2
  ...
  ...
  ...
  commandN
done

for 循环变量的内容语法如下

for VAR in $fileNames
do
  command1
  command2
  ...
  ...
  ...
  commandN
done

for 循环命令替换的语法如下:

for VAR in ${Linux-command-name) #或者使用 for VAR in `Linux-command-name`
do
  command1
  command2
  ...
  ...
  commandN
done

for循环还有三项表达式语法,这和C语言常见的使用方法相同

for (( EXP1; EXP2; EXP3 ))
do
  command1
  command2
  ...
  ...
  commandN
done