RHCE and RHCT exam:exporting NFS filesystems in RHEL4

Exporting NFS filesystem in RHEL4 (Redhat enterprise Linux) servers:

To export directory /home/export you need to add an entry in /etc/exports :

/home/export parmount.ice.com(rw,sync)

make sure there is space between mount options and hostname otherwise you will get permission error on redhat linux client.

RHCE and RHCT exam: max telnet session limit reached in RHEL4

maximum telnet session limit reached in( RHEL4)Redhat Enterprise Linux :

Quick Fix if you are getting maximum telnet service_limit reached messages in /var/log/secure logs in redhat enterprise Linux servers . Awesome you don't need to reboot your RHEL4 server unlike HP-UX serves :

Getting error : xinetd [4092] :FAIL: telnet service_limit

Just change session limit from 60 for instances to some large number

#
# Simple configuration file for xinetd
#
# Some defaults, and include /etc/xinetd.d/
defaults
{
instances = 400
log_type = SYSLOG authpriv
log_on_success = HOST PID
log_on_failure = HOST
cps = 25 30
}

service telnet2
{
flags = REUSE
socket_type = stream
wait = no
user = root
server = /usr/sbin/in.telnetd
log_on_failure += USERID
disable = no
}

#[root@ice]# service xinetd reload