From 6234f76c102d63e50a22c7b7b023b3c2b9538c46 Mon Sep 17 00:00:00 2001
From: diandian <xingdianvip@gmail.com>
Date: Tue, 11 Apr 2023 00:13:05 +0800
Subject: [PATCH] =?UTF-8?q?=E4=B8=8A=E4=BC=A0=E6=96=87=E4=BB=B6=E8=87=B3?=
 =?UTF-8?q?=20'Shell-MD'?=
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---
 Shell-MD/shell三剑客.md    | 106 ++++++++++++++++++++++++++++++++++
 Shell-MD/shell脚本案例.md |  50 ++++++++++++++++
 2 files changed, 156 insertions(+)
 create mode 100644 Shell-MD/shell脚本案例.md

diff --git a/Shell-MD/shell三剑客.md b/Shell-MD/shell三剑客.md
index 9f214d9..208f735 100644
--- a/Shell-MD/shell三剑客.md
+++ b/Shell-MD/shell三剑客.md
@@ -509,7 +509,113 @@ root
 
 ​		egrep: 	扩展的egrep，支持更多的正则表达式元字符
 
+​		fgrep: 	固定grep(fixed grep)，有时也被称作快速(fast grep)，它按字面解释所有的字符(了解)
 
+#### 2.语法格式
+
+```shell
+grep [选项] PATTERN filename filename ...
+```
+
+案例：
+
+```shell
+[root@xingdiancloud ~]# grep 'Tom' /etc/passwd
+[root@xingdiancloud ~]# grep 'bash shell' /etc/test	
+```
+
+注意：
+
+​		找到：				        grep返回的退出状态为0
+​		没找到：				    grep返回的退出状态为1
+​		找不到指定文件：	 grep返回的退出状态为2
+
+来自标准输入或管道：
+
+```shell
+[root@xingdiancloud ~]# ps aux |grep 'sshd'
+[root@xingdiancloud ~]# ll |grep '^d'
+[root@xingdiancloud ~]# grep 'alice' /etc/passwd /etc/shadow /etc/group
+```
+
+#### 2.使用元字符
+
+```shell
+grep:						使用基本元字符集	^, $, ., *, [], [^], \< \>,\(\),\{\}, \+, \|
+egrep(或grep -E):	使用扩展元字符集	?, +, { }, |, ( )
+注：grep也可以使用扩展集中的元字符，仅需要对这些元字符前置一个反斜线
+
+\w					        所有字母与数字，称为字符[a-zA-Z0-9]		 'l[a-zA-Z0-9]*ve'  'l\w*ve'
+\W				        所有字母与数字之外的字符，称为非字符	'love[^a-zA-Z0-9]+' 	    'love\W+'
+\b					        词边界						     '\<love\>'		          '\blove\b'
+```
+
+#### 3.grep示例
+
+```shell
+[root@xingdiancloud ~]# egrep 'N\W' datafile			
+[root@xingdiancloud ~]# egrep '^n' datafile
+[root@xingdiancloud ~]# egrep '4$' datafile
+[root@xingdiancloud ~]# egrep '5\..' datafile	
+[root@xingdiancloud ~]# egrep '\.5' datafile		
+[root@xingdiancloud ~]# egrep '^[we]' datafile
+[root@xingdiancloud ~]# egrep '[^0-9]' datafile	
+[root@xingdiancloud ~]# egrep '[A-Z][A-Z] [A-Z]' datafile
+[root@xingdiancloud ~]# egrep 'ss* ' datafile		
+[root@xingdiancloud ~]# egrep '[a-z]{9}' datafile
+[root@xingdiancloud ~]# egrep '\<north' datafile
+[root@xingdiancloud ~]# egrep '\<north\>' datafile	
+[root@xingdiancloud ~]# egrep '\<[a-r].*n\>' datafile
+[root@xingdiancloud ~]# egrep '^n\w*\W' datafile	
+[root@xingdiancloud ~]# egrep '\bnorth\b' datafile
+[root@xingdiancloud ~]# egrep '3+' datafile
+[root@xingdiancloud ~]# egrep '2\.?[0-9]' datafile	
+[root@xingdiancloud ~]# egrep '(no)+' datafile
+[root@xingdiancloud ~]# egrep 'S(h|u)' datafile
+```
+
+#### 4.grep参数
+
+```shell
+-i, --ignore-case				忽略大小写
+-l, --files-with-matches		只列出匹配行所在的文件名
+-n, --line-number				在每一行前面加上它在文件中的相对行号
+-c, --count							显示成功匹配的行数
+-s, --no-messages				禁止显示文件不存在或文件不可读的错误信息
+-q, --quiet, --silent				静默--quiet, --silent
+-v, --invert-match				反向查找，只显示不匹配的行
+-R, -r, --recursive				递归针对目录
+--color								颜色
+-o, --only-matching			只显示匹配的内容
+```
+
+示例：
+
+```shell
+[root@xingdian ~]# grep -R 'ifcfg' /etc           目录
+
+[root@xingdian ~]# egrep 'root' /etc/passwd /etc/shadow /etc/hosts
+/etc/passwd:root:x:0:0:root:/root:/bin/bash
+/etc/passwd:operator:x:11:0:operator:/root:/sbin/nologin
+/etc/shadow:root:$6$gcO6Vp4t$OX9LmVgpjtur67UQdUYfw7vJW.78.uRXCLIxw4mBk82Z99:7:::
+
+[root@xingdian ~]# egrep -l 'root' /etc/passwd /etc/shadow /etc/hosts
+/etc/passwd
+/etc/shadow
+
+[root@xingdian ~]# egrep -n 'root' /etc/passwd /etc/shadow /etc/hosts 
+/etc/passwd:1:root:x:0:0:root:/root:/bin/bash
+/etc/passwd:11:operator:x:11:0:operator:/root:/sbin/nologin
+/etc/shadow:1:root:$6$gcO6Vp4t$OX9LmVgpjtur67UQdUy8.M78.uRXCLIxw4mBk82ZrNlxyf54
+
+
+[root@xingdian ~]# egrep -R '54:04:A6:CE:C2:1F' /etc/sysconfig/
+
+[root@xingdian ~]# egrep '^IPADDR' /etc/sysconfig/network-scripts/ifcfg-eth0 |egrep -o '[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}'
+192.168.2.254
+[root@xingdian ~]# egrep '^IPADDR' /etc/sysconfig/network-scripts/ifcfg-eth0 |egrep -o '([0-9]{1,3}\.){3}[0-9]{1,3}'
+192.168.2.254
+```
 
 
 
diff --git a/Shell-MD/shell脚本案例.md b/Shell-MD/shell脚本案例.md
new file mode 100644
index 0000000..d3bf12d
--- /dev/null
+++ b/Shell-MD/shell脚本案例.md
@@ -0,0 +1,50 @@
+<h1><center>shell脚本案例</center></h1>
+
+作者：行癫（盗版必究）
+
+------
+
+## 一：脚本案例
+
+#### 1.配置静态IP案例
+
+```shell
+#!/bin/bash
+# This script configures a static IP address on CentOS 7
+
+# Define variables for the IP address, netmask, gateway, and DNS servers
+IP_ADDRESS=192.168.1.100
+NETMASK=255.255.255.0
+GATEWAY=192.168.1.1
+DNS_SERVERS="8.8.8.8 114.114.114.114"
+
+# Backup the original network configuration file
+cp /etc/sysconfig/network-scripts/ifcfg-ens33 /etc/sysconfig/network-scripts/ifcfg-ens33.bak
+
+# Modify the network configuration file with the static IP address, netmask, gateway, and DNS servers
+cat << EOF > /etc/sysconfig/network-scripts/ifcfg-ens33
+TYPE=Ethernet
+BOOTPROTO=none
+NAME=ens33
+DEVICE=ens33
+ONBOOT=yes
+IPADDR=$IP_ADDRESS
+NETMASK=$NETMASK
+GATEWAY=$GATEWAY
+DNS1=${DNS_SERVERS%% *}
+DNS2=${DNS_SERVERS##* }
+EOF
+
+# Restart the network service to apply the changes
+systemctl restart network
+
+# Display the new network configuration
+ip addr show ens33
+```
+
+centos stream 9
+
+```
+
+```
+