Exit Red Hat Graphical Boot (boot splash screen) in a vm:
CRTL + END

Remove files after “k” number of days

find /PATH/TO/FILES/* -mtime +$k -exec rm -rf {} \;

systemctl -a | grep -i servicename
systemctl status servicename
systemctl start servicename

The following will;

• List the rules
• Add a new rule at line 4
• List the rules
• Save the rules
• List the file saving the rules

sudo iptables -L -n --line-numbers
sudo iptables -I INPUT 4 -p tcp -m state --state NEW -m tcp --dport 3306 -j ACCEPT
sudo iptables -L -n --line-numbers
sudo service iptables save
sudo cat /etc/sysconfig/iptables

Server 1 Target 1

[root@server1]# cat /etc/tgt/targets.conf
<target iqn.2010-10.net.company:server1.target1>
 backing-store /dev/sdb
 vendor_id     COMPANY
 scsi_id       server1tgt1
 scsi_sn       0101
</target>

Server 2 Target 1

[root@server2]# cat /etc/tgt/targets.conf
<target iqn.2010-10.net.company:server2.target1>
 backing-store /dev/sdb
 vendor_id     COMPANY
 scsi_id       server2tgt1
 scsi_sn       0201
</target>

http://fedoraproject.org/wiki/EPEL

https://forensics.cert.org

http://rpms.famillecollet.com

ssh -oKexAlgorithms=+diffie-hellman-group1-sha1 user@legacyhost

https://www.openssh.com/legacy.html