1 、数字性循环：
（ 1 ）
[root@host ~]# cat test.sh #!/bin/bash for((i=1;i<=10;i++)) do echo $(expr $i \* 3 + 1) done [root@host ~]# [root@host ~]# sh test.sh 4 7 10 13 16 19 22 25 28 31 [root@host ~]#
（ 2 ）
[root@host ~]# cat test.sh #!/bin/bash for i in $(seq 1 10) do echo $(expr $i \* 3 + 1) done [root@host ~]# [root@host ~]# sh test.sh 4 7 10 13 16 19 22 25 28 31 [root@host ~]#
（ 3 ）
[root@host ~]# cat test.sh
#!/bin/bash
for i in {1..10}
do
echo $(expr $i \* 3 + 1)
done
[root@host ~]#
[root@host ~]# sh test.sh
4
7
10
13
16
19
22
25
28
31
[root@host ~]#
（ 4 ）
[root@host ~]# cat test.sh
#!/bin/bash
awk 'BEGIN{for(i=1; i<=10; i++) print i}'
[root@host ~]#
[root@host ~]# sh test.sh
1
2
3
4
5
6
7
8
9
10
[root@host ~]#
2 、字符性循环
（ 1 ）
[root@host ~]# cat test.sh #!/bin/bash for i in `ls` do echo $i is file name\! done [root@host ~]# [root@host ~]# sh test.sh test.sh is file name! works is file name! [root@host ~]#
（ 2 ）
[root@host ~]# cat test.sh #!/bin/bash for i in $* do echo $i is input chart\! done [root@host ~]# [root@host ~]# sh test.sh abc 123 abc is input chart! 123 is input chart! [root@host ~]#
（ 3 ）
[root@host ~]# cat test.sh #!/bin/bash for i in f1 f2 f3 do echo $i is appoint done [root@host ~]# [root@host ~]# sh test.sh f1 is appoint f2 is appoint f3 is appoint [root@host ~]#
（ 4 ）
[root@host ~]# cat test.sh #!/bin/bash list="rootfs usr data data2" for i in $list do echo $i is appoint done [root@host ~]# [root@host ~]# sh test.sh rootfs is appoint usr is appoint data is appoint data2 is appoint [root@host ~]#
3 、路径查找
（ 1 ）
[root@host ~]# cat test.sh #!/bin/bash for file in /proc/* do echo $file is file path \! done [root@host ~]# [root@host ~]# sh test.sh /proc/1 is file path ! /proc/100 is file path ! /proc/10140 is file path ! /proc/1018 is file path ! /proc/1019 is file path ! ...... [root@host ~]#
（ 2 ）
[root@host ~]# cat test.sh #!/bin/bash for file in $(ls *.sh) do echo $file is file path \! done [root@host ~]# [root@host ~]# sh test.sh test.sh is file path ! [root@host ~]#
参考自：
- https://blog.csdn.net/babyfish13/article/details/52981110
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