要替换的文本
$ cat demo.txt
my name is tom.
do you name is tom?
yes my name is tom, too.
语法
:[addr]s/源字符串/目的字符串/[option]
在底行模式下进行替换
单行替换
$ vim demo.txt
# :s/源字符串/目的字符串/g
:s/tom/steve/g
cat demo.txt
my name is steve.
do you name is tom?
yes my name is tom, too.
全局替换
$ vim demo.txt
# %s/源字符串/目的字符串/g
:%s/tom/jack/g
$ cat demo.txt
my name is jack.
do you name is jack?
yes my name is jack, too.
