linux - java string regex head not contains -
i have string : [root@slave1 ~]# test -d /root/workspace/servers || echo not found [root@slave1 ~]# test -d /root/workspace/servers || echo not found not found [root@slave1 ~]# test -d /root/workspace/servers || echo not found [root@slave1 ~]# test -d desktp || echo not found not found and want find word not found without echo @ first as can see , in string , there 2 match how can ?? use negative lookbehind. "(?<!\\becho )not found(?=\\s|$)" you use same regex in grep. grep -op '(?<!\becho )not found(?=\s|$)' file (?<!\becho ) - don't lookafter echo<space> not found(?=\s|$) - match not found strings must followed space or line end.
