grep \"^`date "+%b %d %T"`\" /var/adm/messages | egrep \"emerg|alert|crit|err|warning\
but get an output like this
ksh: alert: not found
ksh: crit: not found
ksh: err: not found
ksh: warning": not found
grep: can't open "19"
grep: can't open "16:27:16""