Telnet and SSH settings on Linux systems and crontab job setup

Telnet :

To check telnet status 

   $ /sbin/chkconfig  --list telnet

SSH :

$ /sbin/service ssh stop

$ /sbin/service ssh start

$ /sbin/service ssh restart

$ ps -aux | grep ssh

 sshd_config file is allows more settings. 

Crontab :

List the cron jobs in Linux systems

   $ crontab -l

stop emails from cron jobs by redirecting  NULL :

   $  */10 * * * * /usr/local/bin/python2.7      Script_file   > /dev/null 2>&1