Shell 编程（二）

for in 循环语句

#!/bin/bash
for x in one two three four
do
        echo number $x
done

例：取出passwd中每一行name 并输出 hello + name

#!/bin/bash
LINES=`wc -l /home/eko/passwd | cut -d‘ ‘ -f1`
for i in `seq 1 $LINES`
do
        echo "hello,`head -n $i /home/eko/passwd | tail -n 1 | cut -d: -f1`"
done

* seq 语句

[email protected]:/home/eko# seq 1 5
1
2
3
4
5

[email protected]:/home/eko# seq 1 2 10
1
3
5
7
9

 for 循环

#!/bin/bash
for((i=1;i<10;i++))
do
echo "hello $i"
done

 for file in

#!/bin/bash  

for file in /proc/*;
do
echo $file is file path \! ;
done   

#!/bin/bash  

for file in $(ls *.sh)
do
echo $file is file path \! ;
done

while

while [ $count -le 6 ]; do
    echo $count
    count=$((count + 1))
done
echo "finished"

原文地址：https://www.cnblogs.com/xiaoliwang/p/8988711.html