7. Global ID (g ID)

Sed replacement ID g indicates global ). By default, sed will only replace the expression in the opening Syntax of section 6 of the first old in each line ). If you want to replace all the old values in a row with new, you need to use the global ID g.

Replace the first lowercase letter a with the first uppercase letter:

$ Sed's/a/A/'employee.txt

101, John Doe, CEO

102, JAson Smith, ITManager

103, RAjReddy, Sysadmin

104, AnAndRam, Developer

105, JAneMiller, Sales Manager

Replace lowercase letters a with uppercase letters:

$ Sed's/a/A/g'employee.txt

101, John Doe, CEO

102, JAson Smith, ITMAnAger

103, RAjReddy, SysAdmin

104, AnAndRAm, Developer

105, JAneMiller, SAles MAnAger

Note: These two examples apply to the entire file because there is no range specified.

This article is from the "old studio" blog, please be sure to keep this source http://lduan.blog.51cto.com/5428084/1303174