grep搜索交替

Question

grep "^\[bugID[[:digit:]]\{1,\}\]"是第一行。我如何grep bugID 或 TICKET-

[bugID12345] fix for performance issue

[TICKET-12345] fix for memory leak issue

[bugID23244] fix for performance issue

[TICKET-54678] fix for memory leak issue

Answer 1

egrep支持与|进行轮换，[还需要转义：

egrep "^\[(bugID|TICKET-)[[:digit:]]{1,}\]" file
[bugID12345] fix for performance issue
[TICKET-12345] fix for memory leak issue
[bugID23244] fix for performance issue
[TICKET-54678] fix for memory leak issue

如果您不想要整行，请使用-o选项：

egrep -o "^\[(bugID|TICKET-)[[:digit:]]{1,}\]" file
[bugID12345]
[TICKET-12345]
[bugID23244]
[TICKET-54678]