A shell script is a series of commands written in a file; the shell reads the commands from the file just as it would if you typed them into a terminal. 如果你能在 shell 中输入命令,你就能编写 shell 脚本(也称为 Bourne shell 脚本)
Displaying the Scripts Commands ( -v option )所谓的-v标识使得Shell可以在详细输出模式(verbose mode)下运行。实际中,使用该标识可以在执行某行代码之前输出改行代码。这对于我们查找脚本错误是非常有帮助的。 下面我们创建一个Shell脚本,名称为“listusers.sh”,内容如下: 代码语言:javascript 代码运行次数:0 运行...
1、Shell脚本的建立 使用文本编辑器编辑脚本文件 vi test.sh 为脚本文件添加可执行权限 chmod +x test.sh 2、Shell脚本的执行 在子shell中执行 bash test.sh sh test.sh 例如: 注:PATH 环境变量的默认值不包含当前目录,若脚本文件在当前目录,应使用 ./script-file(./代表当前目录) 例如:./ test.sh 1.5 ...
If a compound command or shell function executes in a context where -e is being ignored, none of the commands executed within the compound command or function body will be affected by the -e setting, even if -e is set and a command returns a failure status. If a compound command or sh...
commands 1 commands n done 方括号周围的空格是必填的。 6.For循环 for循环是另一种广泛使用的bashshell构造,它允许用户高效地迭代代码。下面演示了一个简单的示例。 #!/bin/bash for (( counter=1; counter<=10; counter++ ))doecho -n "$counter "done ...
Familiarity with commands likechmodmkdircd Getting Started A shell script needs to be saved with the extension.sh. The file needs to begin with theshebang line(#!) to let the Linux system know which interpreter to use for the shell script. ...
Shell 函数的定义格式如下: function_name () { list of commands [ return value ] } 如果你愿意,也可以在函数名前加上关键字 function: function function_name () { list of commands [ return value ] } 函数返回值,可以显式增加return语句;如果不加,会将最后一条命令运行结果作为返回值。
脚本文件的第一行中#后的惊叹号会告诉shell使用哪个shell来运行脚本(如果是其他编码语言脚本,像python,第一行类似)。 其他地方的#用作注释行。 添加名为test1的脚本文件,内容为: #!/bin/bash # This script displays the date and who's logged on
What is a shell script: a sequence of commands and programming features saved in a file. the programming features like control statement, loops, ... Executing a script using the bash shell: /bin/bash /home/zaki/myscript.sh, we can use directly the bash command if it can be found inside...
Linux Shell Commands 常用Linux命令行 用户和权限相关 增加用户, 修改密码, 增加sudo权限 useradd[username]passwd[username /usr/sbin/visudo-f/etc/sudoers#增加 yourusername ALL=(ALL) ALL 1. 2. 3. 4. 将某目录下的所有文件及目录修改为默认的权限...