progname=${0##*/} ## Get the name of the script without its path ## Default values verbose=0 filename= ## List of options the program will accept; ## those options that take arguments are followed by a colon optstring=f:v ## The loop calls getopts until there are no more options...
: ${HOSTNAME?} {USER?} {MAIL?} echo $HOSTNAME echo $USER echo $MAIL exit 0 在BASH 中 export 命令用于将系统变量输出到外层的 Shell 中了。 4.5 BASH 程序的调试 用bash -x bash-script 命令,可以查看一个出错的 BASH 脚本到底错在什么地方,可以帮助程序员找出脚本中的错误。 另外用 trap 语句可...
#!/bin/bash # Script to list: # directories (if called "lsd") # files (if called "lsf") # links (if called "lsl") # or executables (if called "lsx") # but not any other type of filesystem object. # FIXME: add lsp (list pipes) # # Usage: # <command_name> [switches vali...
1、添加10个用户:tuser601-tuser610 如果用户不存在,才添加,并以绿色显示添加成功;如果存在,则以红色显示已经有此用户; 2、显示一共添加了多少个用户; #!/bin/bash # declare -i count=0 for i in {501..510}; do if id tuser$i &> /dev/null; then echo -e "\033[31mtuser$i\033[0m exi...
3. # This script will ask for couple of parameters 4. # and then continue to work depending on entered values 5. # 6. 7. # Giving the option to user 8. zenity --question --text "Do you want to continue?" 9. 10. # Checking if user wants to proceed ...
"echo "Script's PID: $"echo "Number of arguments: $#"echo "Scripts arguments: $@"echo "Scripts arguments separated in different variables: $1 $2..."# 读取输入：echo "What's your name?"read Name # 这里不需要声明新变量echo Hello, $Name!# 通常的 if 结构看起来像这样：# 'man test'...
... connection to bind WSL 2 localhost to Windows localhost # 关闭默认连接以将WSL 2 localhost绑定到Windows localhost...默认是安装的 2.17.1 版本,不支持 git switch 命令。...,而 Git 默认不会跨越文件系统边界来寻找 .git 目录,您可以设置环境变量 GIT_DISCOVERY_ACROSS_FILESYSTEM=1 来允许 ...
# Use bash for the shell SHELL ["/bin/bash", "-o", "pipefail", "-c"] # Create a script file sourced by both interactive and non-interactive bash shells ENV BASH_ENV /home/user/.bash_env RUN touch "${BASH_ENV}" RUN echo '. "${BASH_ENV}"' >> ~/.bashrc # Download and ...
The script starts with the shebang and some lines of comments. I like to use comments at the top to briefly describe what the script is supposed to do. Then I put in a debug switch withset -x. Try it out if you're not familiar with debugging. It comes in pretty handy when tracing...
开关(Switch也成为选项或标志)是一个字符加一个前导符号“-”,可以增加命令的功能。例如:date显示UTC(全球统一时间)时间,可以加上“-u”开关。 $date –u Wed Apr 4 14:46:41 UTC 2001 因为“选项”和“标准”用于许多场景之中,因此在本书中我们称之为“开关”。