在 /opt/path 目錄下查找hello,并將所有的hello替換為world
sed -i 's/hello/world/g' `grep -rl hello /opt/path`
在 /opt/path 目錄下查找hello/hello,并將所有的hello/hello替換為world/world
sed -i 's/hello\/hello/world\/world/g' `grep -rl 'hello/hello' /opt/path`
The s command (as in substitute) is probably the most important in sed and has a lot of different options. The syntax of the s command is ‘<samp>s/<var style="font-style: italic; font-weight: inherit;">regexp</var>/<var style="font-style: italic; font-weight: inherit;">replacement</var>/<var style="font-style: italic; font-weight: inherit;">flags</var></samp>’.
Its basic concept is simple: the s command attempts to match the pattern space against the supplied regular expression <var style="font-style: italic; font-weight: inherit;">regexp</var>; if the match is successful, then that portion of the pattern space which was matched is replaced with <var style="font-style: italic; font-weight: inherit;">replacement</var>.
For details about <var style="font-style: italic; font-weight: inherit;">regexp</var> syntax see Regular Expression Addresses.
The <var style="font-style: italic; font-weight: inherit;">replacement</var> can contain \<var style="font-style: italic; font-weight: inherit;">n</var> (<var style="font-style: italic; font-weight: inherit;">n</var> being a number from 1 to 9, inclusive) references, which refer to the portion of the match which is contained between the <var style="font-style: italic; font-weight: inherit;">n</var>th \( and its matching \). Also, the <var style="font-style: italic; font-weight: inherit;">replacement</var> can contain unescaped & characters which reference the whole matched portion of the pattern space.
The / characters may be uniformly replaced by any other single character within any given s command. The / character (or whatever other character is used in its stead) can appear in the <var style="font-style: italic; font-weight: inherit;">regexp</var> or <var style="font-style: italic; font-weight: inherit;">replacement</var> only if it is preceded by a \ character.
關(guān)于本文
- 作者：俠骨留香
- 時(shí)間：2019年11月20日
- 聯(lián)系作者：xiaguliuxiang@foxmail.com
