1. sed Feature 对文本进行查看,新增,删除,修改和替换 Format sed[option][pattern][file] option -n: 只显示修改的[pattern], 不真正对[file]修改-i: 对[file]进行修改-e: 一次执行多次[pattern] pattern 行范围p(print) sed -n'2p'user.txt#只查看新打印的第
dpkg | Debian PacKaGe | Debian Linux系统用来安装、创建和管理软件包的实用工具。 ed | EDitor | 单行纯文本编辑器,它有命令模式(command mode)和输入模式(input mode)两种工作模式。 emacs | Editor MACroS | 是由GNU组织的创始人Richard Stallman开发的一个功能强大的全屏文本编辑器,它支持多种编程语言,具有...
The Linuxdatecommand displays and sets the system date and time. It can format the output in various ways, show the current date, time, or print customized formats using format specifiers. It is very useful for scripts that require timestamp logs or for automating tasks based on specific date...
Note:If we did not set any IP address to our device or computer system thenifconfigcommand does not show any IP address, Mac address is always assigned by manufacturer of device or computer system. Setting IP Address in Linux This command can also be used to set IP Address of a Linux b...
实例4 kylechen@kyle:~$ ps a PID TTY STAT TIME COMMAND 1444 tty2 Ssl+ 0:00 /usr/lib/gdm3/gdm-x-session --run-script env GNOME_SH 1446 tty2 Sl+ 19:57 /usr/lib/xorg/Xorg vt2 -displayfd 3 -auth /run/user/1 1457 tty2 Sl+ 0:00 /usr/lib/gnome-session/gnome-session-binary ...
在Linux shell脚本中,set -eux是一条常见的命令,用于设置脚本的执行行为。让我为您解释一下各个部分的含义和用途: set:这是用于设置 shell 选项的命令。 -e:这是set命令的一个选项,它表示"Exitimmediately if a command exits with a non-zero status",即如果任何命令的退出状态码(返回值)不为0,脚本将立即...
Chapter 2How to use chmod command in Linux Explained with Examples Chapter 3How to change default umask permission in Linux Chapter 4SUID, SGID, and Sticky Bit Explained Chapter 5How to set immutable bit with chattr command By default, Linux does not enable any attributes. To verify this, ch...
set +e command1 command2 set -e 上面代码中,set +e表示关闭-e选项,set -e表示重新打开-e选项。 还有一种方法是使用command || true,使得该命令即使执行失败,脚本也不会终止执行。 #!/bin/bash set -e foo || true echo bar 上面代码中,true使得这一行语句总是会执行成功,后面的echo bar会执行。
For more information about this command, see Section 5.5.1, “The get Command”. To set an attribute for a specific process instance, include the process ID in the attribute assignment; the form of such an attribute assignment is attribute_name:process_name:process_id=value. For example, ...
-rbash: clear: command not found [localuser@example ~]$ date -rbash: date: command not found [localuser@example ~]$ ping redhat.com -rbash: ping: command not found 6.Now create the softlinks of commands which are required for userlocaluserto execute in the directory/home/localuser/progra...