UNIX 正则表达式和 SED

你感兴趣的区域插入\和括号。你周围的第一区域被通过\ 1引用,第二个地区用 \ 2引用，等等。假设 phone.txt 有以下文本: (555)555 - 1212 (555)555 - 1213 (555)555 - 1214 (666)555 - 1215 (666)555 - 1216 (777)555 - 1217现在试试下面的命令： $ cat phone.txt | sed 's/\(.*)\)\(.*-\)\(.*$\)/Area \ code: \1 Second: \2 Third: \3/' Area code: (555) Second: 555- Third: 1212 Area code: (555) Second: 555- Third: 1213 Area code: (555) Second: 555- Third: 1214 Area code: (666) Second: 555- Third: 1215 Area code: (666) Second: 555- Third: 1216 Area code: (777) Second: 555- Third: 1217注意:在上面的例子中每个括号内的正则表达式将引用\ 1，，\ 2等等。