bash基本特性及基本命令:1.命令历史:history环境变量:$HISTSIZE:缓存中记录的命令历史条数上限$HISTFILE:命令历史文件目录:~/.bash_hisroty$HISTFILESIZE:命令历史文件中记录的命令历史条数上限-doffset:删除某条命令-c:清空缓存中的命令历史num:显示最近的num条命令-a:手动将缓存中的命令历史追加至命令文件中调用历...
alias命令的作用只局限于该次登入的操作。若要每次登入都能够使用这些命令别名,则可将相应的alias命令存放到bash的初始化文件 /etc/bashrc中。 语法格式:alias [参数] 常用参数: -p打印已经设置的命令别名 参考实例 查看系统已经设置的别名: [root@linuxcool ~]# alias -p alias cp='cp -i' alias l.='ls ...
使用-f 选项，打印文本的列，例如打印文本的第一列内容，使用-f 1。[root@server-01 ~]# cut -f 1 /etc/passwdroot:x:0:0:root:/root:/bin/bashbin:x:1:1:bin:/bin:/sbin/nologindaemon:x:2:2:daemon:/sbin:/sbin/nologinadm:x:3:4:adm:/var/adm:/sbin/nologinlp:x:4:7:lp:/var/spo...
2、split - 划分文件 split 将一个大文件划分成几个较小的文件。(split a file into pieces) 语法:split [OPTION]... [FILE [PREFIX]] 常用组合:split [-d] [-a num] [-l lines] [file [prefix]] -a num,num是创建文件名时用作文件名后缀的字符或数字的数量,默认是aa、ab、ac... -d,(digits...
Bash Split String (+ Shell Scripts) September 15, 2022byBrad Morton This article will show you how to split a string at a given delimiter in Bash/Shell scripts and show some examples. Splitting strings is a handy function to have available when crafting your scripts. CSV (Comma Separated Va...
If there are arguments after the string, they are assigned to the positional parameters, starting with $0. -i If the -i option is present, the shell is interactive. For more information about interactive shells, see invocation, below. -l Make bash act as if it had been invoked as a ...
-n with -b: don't split multibyte characters --complement complement the set of selected bytes, characters or fields -s, --only-delimited do not print lines not containing delimiters --output-delimiter=STRING use STRING as the output delimiter ...
-n with -b: don't split multibyte characters --complement complement the set of selected bytes, characters or fields -s, --only-delimited do not print lines not containing delimiters --output-delimiter=STRING use STRING as the output delimiter ...
(暂停) ctrl+z 查看后台运行程序 jobs 启动后台暂停进程 bg 2 调回后台进程 fg 2 后台运行不受shell 退出影响 nohup cmd & 清空整个屏幕 clear 重新初始化屏幕 reset 查询用过的命令默认1000 条 history 清楚记录命令 history -c cat /root/.bash_history 查看登陆过的用户信息 last last -n user who /...
read is a bash built-in command that reads a line from the standard input (or from the file descriptor) and split into words.