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root user

Under Debian Linux ( and most other distros) startup files are stored in /etc/init.d/ directory and symbolic linked between /etc/rcX.d/ directory exists. Debian Linux (Red Hat/ Fedora) uses System V initialization scripts to start services at boot time from /etc/rcX.d/ directory. Debian Linux comes with different utilities to remove unwanted startup file:
(A) rcconf
It [...]

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RedHat Linux command to reload or restart network (login as root user):
# service network restart
OR
# /etc/init.d/network restart
To start Linux network service:
# service network start
To stop Linux network service:
# service network stop
Debian Linux command to reload or restart network:
# /etc/init.d/networking restart
To start Linux network service:
# /etc/init.d/networking start
To stop Linux network service:
# /etc/init.d/networking stop
Ubuntu [...]

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inetd is a daemon on Linux (BSD/Unix) systems that manages Internet services. inetd listens on all ports used by internet services such as FTP, POP3, and telnet. When a TCP packet or UDP packet comes in with a particular port number, inetd launches the appropriate server program to handle the connection. This uses memory [...]

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You need to remove driver related to Ethernet card. Under Linux use following commands:
1) Find out driver attached to eth0 using following command
lsmod | less
2) Remove the driver using rmmod command:
rmmod driver-name
3) Again insert driver into kernel using
modprobe driver-name
For example, let us assume your driver name is 8139too , then your command should [...]

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A remote Linux / UNIX server can be rebooted using following methods:
A) Login to remote server using ssh as root user and use any one of the following syntax:
ssh root@remote-server-ip
OR
ssh root@remote-server-name
When prompted for password please supply remote server root password.
B) Type reboot command as follows:
reboot
You can also save time using the following [...]

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A firewall is designed to help protect your computer from attack by malicious users or by malicious software (viruses that use unsolicited incoming network traffic to attack).
Also before you disable your firewall, you must disconnect your computer from all networks, including the Internet to avoid damage
You would like to Halt linux [...]

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