Linux基础——sed工具总结

1、将字段串“plugins=1”替换为“plugins=0”

sed -i 's/plugins=1/plugins=0/g' /etc/yum.conf

2、将字符串“\$1>="\$date_source" \&\& \$1<="\$date_dest"”替换为“\$1>='\"\$date_source\"' \&\& \$1<='\"\$date_dest\"'”

sed -i 's/\$1>="\$date_source" \&\& \$1<="\$date_dest"/\$1>='\"\$date_source\"' \&\& \$1<='\"\$date_dest\"'/g' check_sarlog.sh
注意：
"\$1"：加\反编译特殊字符"$";
"\&\&":加\反编译特殊字符字符"&";
"\$date_dest":加\反编译特殊字符字符"$";

3、删除关键字"111",避免存在空行导致shell脚本或者配置config执行报错

sed -i "/111/d" /tmp/text.txt

[root@Harbor ~]# cat /tmp/text.txt
111
222
333
[root@Harbor ~]# sed -i "/111/d" /tmp/text.txt
[root@Harbor ~]# cat /tmp/text.txt
222
333

4、打印关键字“DNS”行

[root@Harbor ~]# sed -n "/DNS/p" /etc/ssh/sshd_config 
#UseDNS no

5、删除文件text.txt第二行"222 two"并打印

[root@Harbor tmp]# cat text.txt 
111 one
222 two
333 three
[root@Harbor tmp]# sed '2d' text.txt 
111 one
333 three

6、删除文件text.txt多行并打印

# 删除第一行到第二行
[root@Harbor tmp]# sed '1,2d' text.txt 
333 three
# 删除第二行到第三行
[root@Harbor tmp]# sed '2,3d' text.txt 
111 one

7、删除[Tt]大小写wo的字符并打印

[root@Harbor tmp]# sed '/[Tt]wo/d' text.txt 
111 one
333 three

8、打印指定3,4行

[root@Harbor tmp]# sed -n "3,4p" text.txt 
333 three
444 Two

9、打印第3到第4行将字符Two和two替换为Ten

[root@Harbor tmp]# sed '1,4s/[Tt]wo/Ten/g' text.txt 
111 one
222 Ten
333 three
444 Ten

10、删除不包含字符Two和two行并打印

[root@Harbor tmp]# sed '/[Tt]wo/!d' text.txt 
222 two
444 Two

11、打印包含字符Two和two的行到文件/tmp/tmp.txt

[root@Harbor tmp]# sed -n '/[Tt]wo/w /tmp/tmp.txt' text.txt 
[root@Harbor tmp]# cat /tmp/tmp.txt
222 two
444 Two