001、
[root@PC1 test03]# ls a.txt [root@PC1 test03]# cat a.txt ## 测试数据 bookbookbookbook jjjj name=jack uuuuuuu 127.0.0.1 bookbook77 xxxxx.com eeebookbook xwowof344 bookbook bookbook 3333333 [root@PC1 test03]# sed 's/bookbook/Q/g' a.txt ## 将所有的bookbook替换为Q QQ jjjj name=jack uuuuuuu 127.0.0.1 Q77 xxxxx.com eeeQ xwowof344 Q Q 3333333
002、精确匹配替换
[root@PC1 test03]# ls a.txt [root@PC1 test03]# cat a.txt bookbookbookbook jjjj name=jack uuuuuuu 127.0.0.1 bookbook77 xxxxx.com eeebookbook xwowof344 bookbook bookbook 3333333 [root@PC1 test03]# sed 's/\<bookbook\>/Q/g' a.txt ## 只对bookbook完整的单词进行替换 bookbookbookbook jjjj name=jack uuuuuuu 127.0.0.1 bookbook77 xxxxx.com eeebookbook xwowof344 Q Q 3333333
