Stream editor command for manipulating text one line at a time. Sed is similar to the many Unix implementations, but only supports the "s" command (substitute) currently. Pass or pipe the text to process or a filename along with the --file flag. . {code:bash} sed "hello world" s/hello/goodbye/ Outputs: "goodbye world" {code} . The substitute command syntax is "s/replaceMe/withMe/" where "s" is the command, "replaceMe" is a CFML regular expression, and "withMe" is a replacement expression. . Supported pattern flags are "g" (global) which replaces all instances per line, and "i" (ignore case) which makes the replacement case-insensitive. . {code:bash} echo "one hundred and one" | sed s/ONE/two/gi Outputs: "two hundred and two" {code} . All other regex rules follow what is implemented in REReplace() CFML function. . The delimiter in the subsdtitute command does not have to be "/". Whatever character that immediatley follows the "s" will be used. This can be useful where the regex and/or replacement text contain a "/". . This example uses a tilde (~) as the delimiter. It reads a file, replaces all instances of a given file path, and writes the file back out. . {code:bash} sed --file config.cfm s~/var/www/~/sites/wwwroot/~i > config.cfm {code}