Contents: Chapter 1: Powerful CD Command Hacks * Hack 1. Use CDPATH to define the base directory for cd command * Hack 2. Use cd alias to navigate up the directory effectively * Hack 3. Perform mkdir and cd using a single command * Hack 4. Use “ cd
假设您正在‘/usr/src//Documentation’目录下搜索带字符串‘magic’的文件： $ grep magic /usr/src//Documentation/* sysrq.txt：* How do I enable the magic SysRQ key？ sysrq.txt：* How do I use the magic SysRQ key？ $ ls -l | grep '^a' 通过管道过滤ls -l输出的内容，只显示以a开头的行。
Linux 101 Hacks 2nd Edition – Table of Contents Chapter 1: Powerful CD Command Hacks Hack 1. Define CD Base Directory Using CDPATH Hack 2. Use CD Alias to Navigate Up the Directory Hack 3. Perform mkdir and cd Using a Single Command Hack 4. Toggle B
用‘grep’搜索文本文件
如果您要在几个文本文件中查找一字符串，可以使用‘grep’命令。‘grep’在文本中搜索指定的字符串。举个例子：假设您正在‘/usr/src/linux/Documentation’目录下搜索带字符串‘magic’的文件：
$ grep magic /usr/src/linux/Documentation/*
sysrq.txt:* How do I enable the magic SysRQ key?
sysrq.txt:* How do I use the m
linux sysctl参数配置
步骤及实现：
sudo vi /etc/sysctl.conf
代码：
# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and
# sysctl.conf(5) for more details.
# Controls the System Request debuggi
