sed命令:some_var='echo $some_var | sed -e s/ \\\./ \\\\\\\./g' 7个斜杠some_var='echo $some_var | sed -e s/ [$]/ \\\\\\\\$/g' 8个斜杠

sed命令:some_var='echo $some_var | sed -e s/ \\\./ \\\\\\\./g' 7个斜杠some_var='echo $some_var | sed -e s/ [$]/ \\\\\\\\$/g' 8个斜杠
sed命令:some_var='echo $some_var | sed -e s/ \\\./ \\\\\\\./g' 7个斜杠
some_var='echo $some_var | sed -e s/ [$]/ \\\\\\\\$/g' 8个斜杠

sed命令:some_var='echo $some_var | sed -e s/ \\\./ \\\\\\\./g' 7个斜杠some_var='echo $some_var | sed -e s/ [$]/ \\\\\\\\$/g' 8个斜杠
s/\\\./\\\\\\\./g 表示把’\.‘替换为'\\\.'
因为“\”和“.”自身有转义的意思,\\表示去除第二个\的特殊含义,\.表示去除.的特殊含义.所以\\\.实际传给sed的直是\.
下面的那个也是这样