从这个 Bash 基础训练课程,我们将学习 Bash 的基础知识,并能开始些我们自己的 Bash 脚本和自动化日常任务。 Bash 是一种Unixshell和命令语言。它可以在各种操作系统上广泛使用,而且它也是大多数Linux系统上的默认命令解释器。 Bash 是 Bourne-Again SHell 的简称。 与其他shell一样,我们可以在终端中交互式地直接使...
Compound Commands 复合命令 compound command(复合命令) 是如下情况之一: (list) list 序列将在一个子 shell 中执行。变量赋值和影响 shell 环境变 量 的内建命令在命令结束后不会再起作用。返回值是序列的返回值。 { list; } list 序列将在当前 shell 环境中执行。序列必须以一个新行符或分号结 束。这种做...
Here, we list some basic bash syntax with a brief explanation. It is a good starting point if you are a beginner.
alias ipt = 'sudo /sbin/iptables' # display all rules # alias iptlist = 'sudo /sbin/iptables -L -n -v --line-numbers' alias iptlistin = 'sudo /sbin/iptables -L INPUT -n -v --line-numbers' alias iptlistout = 'sudo /sbin/iptables -L OUTPUT -n -v --line-numbers' alias ipt...
complete[-abcdefgjksuv] [-ocomp-option] [-Aaction] [-Gglobpat] [-Wwordlist] [-Pprefix] [-Ssuffix] [-Xfilterpat] [-Ffunction] [-Ccommand]name[name ...] complete-pr[name...] 指定每个name的参数应当如何被补全。如果给出了-p选项,或者没有选项给出,现有的补全规则将被显示出来,以一种可...
This serves as an excellent reminder of why you should look closely at the manual for all Linux commands. Learning Bash is like learning English as a second language. There are many exceptions to the rules. wcommand Users come, users go, and sometimes you get users you don't want at all...
-s If the -s option is present, or if no arguments remain after option processing, then commands are read from the standard input. This option allows the positional parameters to be set when invoking an interactive shell. -D A list of all double-quoted strings preceded by $ is printed ...
For those apt with Unix commands, often times, you'll need to add up many numbers given to you in the shell. The quick and easy way to do this, is to useawk. For this example, we'll assume you've already got your list of numbers (one per line) in a file called numbers.txt....
Bash enables combining commands bypipingoutput of one command to be used as the input for another command. For example, this command can be used to listallfiles on a file system using the -R parameter to specify the listing should be recursive: ...
全称:为“list”,意思为列表,清单。 作用:查看当前目录下的文件和目录 ls -d 当遇到目录时列出目录本身而非目录内的文件 -d, --directory 当遇到目录时列出目录本身而非目录内的文件 0 ✓ 02:43:33 root@yyds,10.0.0.100:~ # ll /tmp total 4 ...