1.测试文件

[root@L shells]# cat catDog.txt snakesnakepigbirddogcat snake  pigbirdsnakecatbirddog birdtigersnakebirdcatlionjisdf

2.sed脚本文件

[root@L shells]# cat sed.txt/cat/,/dog/s/$/<---/

3.测试效果

[root@L shells]# sed -f sed.txt < catDog.txt snakesnakepigbirddogcat <---snake  <---pig<---bird<---snake<---cat<---bird<---dog <---birdtigersnakebirdcat<---lion<---ji<---sdf<---