sed -i 's/char/chara/g' filename #这里是将filename的文件中所有的char替换为charased '/^$/d' file #删除空白行sed '2d' file #删除第二行sed '2,$d' file #删除第二行到最后一行sed '$d' file #删除最后一行sed '/^test/'d file #删除开头为test的行sed -i '2a\this is a test line' test.conf […]