# C-style for loop, which is not avaiable in /bin/sh for ((i = 1; i <= 5; i++)) do echo "Number $i" done 1. 2. 3. 4. 5. 6. 7. You can save any of these scripts to a file (e.g.,script.sh), make it executable withchmod +x script.sh, and run it with./scri...
If you don’t specify the keyword “in” followed by any list of values in the bash for loop, it will use the positional parameters (i.e the arguments that are passed to the shell script). $ cat for3.sh i=1 for day do echo "Weekday $((i++)) : $day" done $ ./for3.sh ...
fruit=orange; and on the third and final iteration,fruit=pear. Once it has completed the loop, the script continues normal execution with the next command after thedonestatement. In this case, it ends by saying “Let’s make a salad!” to show that it has ended the loop, but not the...
sh #!/bin/bash Lists=$(cat /opt/user.txt) for bb in $Lists do userdel -r $bb '-r 删除家目录' #echo "123456" | passwd --stdin $bb &> /dev/null echo "$bb删除成功" done [root@localhost opt]# ./useradd.sh zhangsan删除成功 lisi删除成功 wangermazi删除成功 zhaoliu删除成功 tianji...
In this final chapter on flow control, we will look at another of the shell’s looping constructs.The for loop differs from the while and until loops in that it ...
# 自定义列表forloopin12345doecho"loop=$loop"doneexit0deyuy/bin/my_shell >>chmodu+x for1.shdeyuy/bin/my_shell >> ./for1.shloop=1loop=2loop=3loop=4loop=5还可以通过读取文件内容生成变量列表deyuy/bin/my_shell >>vim num.txt12345 ...
[root@www shell-script]# cat c_for02.sh#!/bin/bashfor((i=1,j=100;i<=10;i++,j--))doecho"i=$ij=$j"done 1. 2. 3. 4. 5. 6. for的无限循环 #!/bin/bashfor((i=0;i<1;i+=0))doecho"infinite loop"done 1. 2.
This example is used to wait till the machine comes up before doing a ssh to that machine. The until loop statement ends only when the ping gives the responses. $ cat mac_wait.sh #! /bin/bash read -p "Enter IP Address:" ipadd ...
There you will find an entrypoint folder with multiple scripts or anentrypoint.shscript file. Here is annginx example Try to understand the shell script and its functionality. In this process, you will figure out many concepts and logic that can be used while writing a shell script. (function...
When you are back in the terminal, you can use the same to execute your modified Bash script: $bashtest.sh Conclusion These three are very primitive examples of using the “for” loop in your Bash scripts. As you continue learning more about what these scripts can do, you’ll see that...