How to Exit from a Script There are some cases, such as we have written a script to test some code and we need to exit the script in case the code fails, then we can use theexitcommand in the script. A script is terminated with theexitcommand, much like a C program. ...
Running the script demonstrates that the program ends when the variableireaches the value2. Using break Inside a select Loop Theselectcommand creates menus and behaves like an infinite loop, even though it's not one of the primary loop constructs. To exit theselectstatement elegantly, make a ca...
Linux程式设计- Script(bash)--(8)返回状态Exit返回状态值可以使得程式与程式之间利用返回状态值可以使得程式与程式之间利用返回状态值可以使得程式与程式之间利用shellshellshellscriptscriptscript来结合的可能性大增利用小程式透过来结合的可能性大增利用小程式透过来结合的可能性大增利用小程式透过shellshellshellscript...
if [ `date +%H` -ge 17 ]; then exit # exit script fi echo keep running ~/bin/process_data # do some work done 如果要退出循环而不是退出脚本,请使用break命令而不是exit。 #!/bin/bash while true do if [ `date +%H` -ge 17 ]; then break # exit loop fi echo keep running ~/bin...
followed by the path to the shell, in this case bash - this acts as an interpreter directive and ensures that the script is executed under the correct shell.The "#" character indicates a comment, so the shebang line is ignored by bash when running the script.Next...
The most common logic errors in a shell script include: Incorrect use of a test operator in a Conditional Statement like using -z instead of -n in a if condition Incorrect use of an Arithmetic operator like multiplying instead of diving a number Incorrect condition to exit from a Bash Loop...
$ ./myscript 'arg 1' arg2 arg3 parameter: 'arg 1' parameter: 'arg2' parameter: 'arg3' 上面正确的例子中,第一个参数 'arg 1' 在展开后依然是一个独立的单词,而不会被拆分成两个。 25. function foo() 这种写法不一定能够兼容所有 shell,兼容的写法是: ...
If a shell script runs into problems during its execution, resulting in an error signal that interrupts the script unexpectedly it may leave behind temporary files that cause trouble when a user restarts the script. UsingBash trap Command, you can ensure your scripts always exit predictably....
Bash Pitfalls[1]文章介绍了 40 多条日常 Bash 编程中,老手和新手都容易忽略的错误编程习惯。每条作者在给出错误的范例上,详细分析与解释错误的原因,同时给出正确的改写建议。文中有不少引用的文章,也值得大家仔细阅读。仔细阅读了这篇文章后,收获很多,不感独享,把这篇文章以半翻译半笔记的形式分享给大家。
commit new bash script Feb 24, 2018 147 148 149 150 151 152 153 154 155 156 kill -l # 查看所有信号 kill -l TERM # 查看 TERM 信号的编号 killall {procname} # 按名称结束进程 top # 查看最活跃的进程 top -u {user} # 查看某用户最活跃的进程 ...