See explanation below.
Explanation/Reference:
Explanation:
/etc/fstab:
/root/examine.iso /mnt/iso iso9660 loop 0 0 mount -a
mount | grep examine

below
iptables -F
service iptables save
iptables -A INPUT -s 172.25.0.0/16 -j REJECT
service iptables save
service iptables restart

see explanation below.
Explanation
* vim /etc/sysctl.conf net.ipv4.ip_forward = 1
* sysctl -w (takes effect immediately)
If no "sysctl.conf" option, use these commands:
* sysctl -a |grep net.ipv4
* sysctl -P net.ipv4.ip_forward = 1
* sysctl -w

Answer see in the explanation.
Explanation/Reference:
(a) Created as administrator
# crontab -u natasha -e
23 14 * * * /bin/echo "file"
(b)Created as natasha
# su - natasha
$ crontab -e
23 14 * * * /bin/echo "file"

see explanation below.
Explanation
* vi /etc/sysconfing/network NETWORKING=yes HOSTNAME=station?.example.com GATEWAY=192.168.0.254 service network restart
2.vi /etc/sysconfig/network-scripts/ifcfg-eth0 DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
IPADDR=X.X.X.X
NETMASK=X.X.X.X
GATEWAY=192.168.0.254
ifdown eth0
ifup eth0