While ShellCheck is mostly intended for interactive use, it can easily be added to builds or test suites. It makes canonical use of exit codes, so you can just add ashellcheckcommand as part of the process. For example, in a Makefile: check-scripts:# Fail if any of these files have w...
set+e # +e表示关闭-e选项,set-e表示重新打开-e选项command1command2set-e# 脚本只要发生错误,就终止执行 set-x #用来在运行结果之前,先输出执行的那一行命令set-o xtrace#与set-x等价 Unix命令同样可以在bash脚本中使用。这些命令通常是用来进行文件和文字操作的...
Bash functions differ from most programming languages when it comes to returning a value from a function. By default, bash returns the exit status of the last executed command in the function's body. The script below shows how to specify the exit status using return: 1. Create a script and...
Copy In this code block, we first assign the value of$RANDOMto the variablerandom_number. Then, we print the value ofrandom_numberusing theechocommand. Each time you run this script, a new random number between 0 and 32767 will be printed. The Range of $RANDOM The$RANDOMvariable generates...
值并发生重复赋值时,bash会覆盖该键。这 允许我们有效地删除数组重复。 CAVEAT:需要bash4+ 示例功能: remove_array_dups() { # Usage: remove_array_dups "array" declare -A tmp_array for i in "$@"; do [[ $i ]] && IFS=" " tmp_array["${i:- }"]=1 ...
The break command syntax is break [n] and can be used in any bash loop construct. The [n] parameter is optional and allows you to specify which level of enclosing loop to exit, the default value is 1. The return status is zero, unless n is not greater or equal to 1. [me@linux ...
/bin/sh # http://code.google.com/p/mooon # 通用的停止指定名的进程 # 特色: # 1. 只会停止当前用户名下的进程 # 2...可以指定命令行参数,可执行精准停止 # 检查参数 # 参数1:需要停止的进程名或它的完整命令行或部分命令行 if test $# -ne 1; t...
R*** 进入替换模式,直至按 <ESC> 键退出替换模式而进入正常模式。 [number] c object || c [number] object cw** 不仅仅是替换了一个单词,也让您进入文本插入状态 c$ 替换从当前光标当前位置直到当前行末 特殊字符:set list 显示以“$”表示的换行符和以“^I”表示的制表符 ...
#os.system(command):该方法在调用完shell脚本后,返回一个16位的二进制数, #低位为杀死所调用脚本的信号号码,高位为脚本的退出状态码, #即脚本中exit 1的代码执行后,os.system函数返回值的高位数则是1,如果低位数是0的情况下, #则函数的返回值是0x0100,换算为十进制得到256。
# alias ls # command # shellcheck disable=SC1001 \ls绕过shell函数# function ls # command command lscommand命令 调用指定的指令并执行,命令执行时不查询shell函数。command命令只能够执行shell内部的命令。在后台运行命令这将运行给定命令并使其保持后台运行,即使终端或SSH连接中断后也是如此。但是会忽略所有输出...