sed删除文件中的一行内容的脚本代码

root@localhost ~]# cat file.txt
hello world
a:b:c -h -n
a:b:c -h -n

[root@localhost ~]# sed -i '/a:b:c -h -n/d' file.txt
[root@localhost ~]# cat file.txt
hello world

[root@localhost ~]# sed -i 's/hello/baidu/' file.sh
[root@localhost ~]# cat file.sh
baidu world