linux for 循环

转载https://blog.csdn.net/babyfish13/article/details/52981110

第一类：数字性循环
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for1-1.sh

    #!/bin/bash
     
    for((i=1;i<=10;i++));
    do
    echo $(expr $i \* 3 + 1);
    done


-----------------------------
for1-2.sh

    #!/bin/bash
     
    for i in $(seq 1 10)
    do
    echo $(expr $i \* 3 + 1);
    done


-----------------------------
for1-3.sh

    #!/bin/bash
     
    for i in {1..10}
    do
    echo $(expr $i \* 3 + 1);
    done


-----------------------------
for1-4.sh

    #!/bin/bash
     
    awk 'BEGIN{for(i=1; i<=10; i++) print i}'


第二类：字符性循环
-----------------------------
for2-1.sh

    #!/bin/bash
     
    for i in `ls`;
    do
    echo $i is file name\! ;
    done


-----------------------------
for2-2.sh

    #!/bin/bash
     
    for i in $* ;
    do
    echo $i is input chart\! ;
    done


-----------------------------
for2-3.sh

    #!/bin/bash
     
    for i in f1 f2 f3 ;
    do
    echo $i is appoint ;
    done


-----------------------------
for2-4.sh

    #!/bin/bash
     
    list="rootfs usr data data2"
    for i in $list;
    do
    echo $i is appoint ;
    done


第三类：路径查找
-----------------------------
for3-1.sh

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


-----------------------------
for3-2.sh

    #!/bin/bash
     
    for file in $(ls *.sh)
    do
    echo $file is file path \! ;
    done
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作者：BabyFish13
来源：CSDN
原文：https://blog.csdn.net/babyfish13/article/details/52981110
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