When you execute a command or run a script, you receive anexit code. An exit code is a system response that reports success, an error, or another condition that provides a clue about what caused an unexpected result from your command or script. Yet, you might never know about the code,...
When you execute a command or run a script, you receive anexit code. An exit code is a system response that reports success, an error, or another condition that provides a clue about what caused an unexpected result from your command or script. Yet, you might never know about the code,...
Execute the command: $command_to_execute Executes the command stored in the variable 'command_to_execute'. In this case, it runs the "ls /new_dir" command, listing the contents of the directory /new_dir. Get the exit status code: exit_status=$? Captures the exit status code of the p...
那么直接跳转到行首或者行尾 ctrl+w / alt+d: ctrl+w 以光标位置为分割，
check_command() { if ! command -v ifconfig >/dev/null 2>&1; then echo -e "\033[31mifconfig命令不存在,正在下载安装!\033[0m" if os="ubuntu"; then apt install -y net-tools >/dev/null 2>&1 elif os="centos"; then yum install -y net-tools >/dev/null 2>&1 elif os="fedor...
To check the exit status of a command, we use the special question?mark variable that bash sets for us. $echo$?## 0 See what it looks like if we do something that intentionally won't work. If youlson a folder that doesn't exist, it will return an error. ...
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: ...
First, enter this command to make sure you're in the right place: Bash Copy cd ~ This command moved you back to your special home directory in the shell, if you weren't already there. Double check by using the pwd command one more time: Bash Copy pwd You should see an output...
When the original PROMPT_COMMAND is an array: exit code of last executed command is not restored before executing the commands stored inside the original PROMPT_COMMAND array __vsc_status is assigned the exit code of the penultimate command stored inside the original PROMPT_COMMAND array Those 2...
# 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...