Command-Line Arguments All the executable programs above have a main(void) program more generally, executables take arguments on the command line these enter the program via parameters 切换行号显示 1 int main(int argc, char *argv[]) For example: prompt$ ./…

● type – Indicate how a command name is interpreted● which – Display which executable program will be executed● help – Get help for shell builtins● man – Display a command's manual page● apropos – Display a list of appropriate commands● info – Displa…

安装 在centos中安装aws cli,安装依赖python,先装好python,然后按下述命令执行 yum install wget wget https://bootstrap.pypa.io/get-pip.py python get-pip.py pip install awscli 配置 在使用之前需要配置自己的key ID及 Access Key,执行aws configure,一步步配置如下: AWS Access Key ID [None]: AKIAI44QH8DHBEXAM…

ps - report a snapshot of current processes top - display tasks job - list active jobs bg - place a job in the background fg - place a job in the foreground kill - send a signal to a process killall - kill processes by name shutdown - showdown or reb…

id - display user identity chmod - umask -…

● cat - Concatenate files● sort - Sort lines of text● uniq - Report or omit repeated lines● grep - Print lines matching a pattern● wc - Print newline, word, and byte counts for each file● head - Output the first part of a file● tail - Output the last…

cp - Copy Files and directories mv - move/rename files and directories mkdir - create directories rm - remove files and directories ln - create hard and symbolic links…

MySQL5.7.27报错“[Warning] Using a password on the command line interface can be insecure.”在命令行使用密码不安全警告 原因 这个错误是在我执行备份脚本的时候出现的 # mysqldump -h主机名 -u用户名 -p密码 数据库名称 > /usr/local/dbbackup/数据库名称_$(date +%Y%m%d_%H%M%S).sql 原因是mysql的安全机制导致,因为在命令行直接将命令写上,被认为是不…

Vue组件 非单文件组件 一个文件包含多个组件 单文件组件 一个文件只包含一个组件,vue文件初始化:vueInit <template lang=""> <div> </div> </template> <script> export default { } </script> <style lang=""> </style> template写组件的结构,script…

mac sudo npm install -g nrm sudo npm config -g set unsafe-perm sudo npm install webpack@3.0.0 -g sudo npm install --global webpack-cli sudo npm install --global vue-cli vue-cli 脚手架 Command Line Interface 使用管理员身份运行 "命令行提示符" 1. npm install --globa…