变量 变量是在程序中保存用户数据的一块内存空间,变量名就是这个内存空间的地址 计算机重启后,变量数值会丢失 标准的命名为x="xxxxxxx" 变量调用为${x},在不引起歧...
grep [OPTION...] PATTERNS [FILE...] grep [OPTION...] -e PATTERNS ... [FILE...] grep [OP...
man [OPTION...] [SECTION] PAGE... an interface to the on-line reference manuals 在线的帮助手册...
userdel [options] LOGIN delete a user account and related files 删除用户 如果有用户正在使用,须kill掉所有...
usermod [options] LOGIN modify a user account 更改用户属性 usermod不允许你改变正在线上的使用者帐号名称。当usermod...
useradd [-d home] [-s shell] [-c comment] [-m [-k template]] [-f inactive] [-e expire ]...
updatedb [OPTION]... Update a mlocate database 更新数据库文件 数据库一天更新一次,/tmp目录不在数据库更新及搜索范围之内 权...
enable [-a] [-dnps] [-f filename] [name ...] Enable and disable builtin shell commands ...
hash [-lr] [-p pathname] [-dt] [name ...] Remember or display program locations 显示指令缓冲区...
whereis [options] [-BMS directory... -f] name... locate the binary, source, and manual ...
which [options] [--] programname [...] shows the full path of (shell) commands 按$PATH查找...
apropos [-dalv?V] [-e|-w|-r] [-s list] [-m system[,...]] [-M path] [-L locale] [-C fi...
locate [OPTION]... [PATTERN]... Search for entries in a mlocate database 在数据库内快速定位文件 数据...
find [-H] [-L] [-P] [-D debugopts] [-Olevel] [path...] [expression] find - search for f...
touch [OPTION]... FILE... Update the access and modification times of each FILE to the ...
stat [OPTION]... FILE... Display file or file system status 显示文件的系统属性相关 常用选项-f:display ...