Expands to the name of the shell or shell script. This is set at shell initialization. If bash is invoked with a file of commands, $0 is set to the name of that file. If bash is started with the -c option, then $0 is set to the first argument after the string to be executed, ...
我想把工作目录改为Bash脚本所在的目录,以便我可以对该目录下的文件进行操作,像这样: 代码语言:javascript 复制 $./application 答: 咱们容易想到的方法是使用 dirname "$0"。 代码语言:javascript 复制 #!/usr/bin/env bashecho"The script you are running has:"echo"basename: [$(basename "$0")]"echo"dir...
scriptname >filename重定向scriptname的输出到文件filename中去,如果文件存在则覆盖; command &>filename重定向command的标准输出(stdout)和标准错误(stderr)到文件filename中; command >&2把command的标准输出(stdout)重定向到标准错误(stderr)中; scriptname >>filename把scriptname的输出(同>)追加到文件filenmae...
# 位置参数调用, 假设在终端输入 bash bash_tutorial.sh 1 2 3 echo "current script name: \$0 $0" # 当前脚本名称 echo "incoming parameters: \$1 $1 \$2 $2 \$3 $3" # 访问传入的参数 echo "the number of parameters: \$# $#" # 传入的参数数量 echo "all parameters: \$@ $@" # ...
Using global variable in Bahs script 你是否注意到它如何自动将我的名字添加到其中?这就是包含用户名的全局变量$USER的魔力。 你可能还注意到,我有时将"与echo一起使用,但其他时候则不使用。这是故意的。bash 中的引号有特殊含义。它们可用于处理空格和其他特殊字符。让我展示一个例子。
The "ls" command lists the contents of the current directory. The > symbol is used for output redirection, which directs the output of the "ls" command to the file named "test.txt". When you run this script, it will execute the "ls" command and save its output to a file named '...
Another alternative is to run the script from a different directory. After you create the bash script, use the pwd command to find your current directory. Once you know the path, you can run the script from any directory. For example, use the following command to run function.sh from the...
$0变量也可以用于获取命令行参数中的程序名称。例如,如果我们执行以下命令:./myscript.sh argument1 argument2,那么$0变量将包含“myscript.sh”,而 $1 变量将包含“argument1”,$2 变量将包含“argument2”。 结论 在Bash 脚本中,$0变量是一个特殊变量,用于表示当前脚本的路径和名称。它可以用于显示脚本名称和路...
(the current directory) is part of your command search path, i.e., the script’s directory path (as discussed in Chapter 3). If these aren’t in your path, you must type ./ scriptname, which is really the same thing as typing the script’s absolute pathname (see Chapter 1. Before...
# Check before running: Need 3 arguments to run the script properly if [[ $# -lt 2 ]]; then echo "Didn't run, because the number of argument needs to be 2" echo "EX: $0 [/path/to/file] [new_name_prefix]" exit 0 fi