cicscli -i
cicscli -i=servername
where servername is the name of a CICS® server. This stops only the session with the named server; it does not shut down the Client daemon or connections to other servers.
kill -2 pid
where pid is the numeric process id of cclclnt.Do not use the kill -9 command as this stops a process without allowing its resources to be released; those resources remain active until you restart the system.