Linux Blog

HowTo Create a Driver Diskette from an Image File

To create a driver diskette from a driver diskette image:

Insert a blank, formatted diskette into the first diskette drive.
From the same directory containing the driver diskette image, such as drvnet.img, type
dd if=drvnet.img of=/dev/fd0 as root.

Wait for sometime before system writes the diriver files into the diskette.

How to rename all files in directory at once

wget -c http://easylinux.info/uploads/mvb_1.6.tgz
tar zxvf mvb_1.6.tgz -C /usr/share/
chown -R root:root /usr/share/mvb_1.6/
ln -fs /usr/share/mvb_1.6/mvb /usr/bin/mvb

To rename all files in directory at once

mvb NEW_NAME

How to add multiple IP addresses manually?

There are cases where one has to bind multiple ip address to same ethernet card, here are some steps to add them into your network configuration.

# ifconfig

will output all the configured addresses. For example:

eth0: inet addr:10.10.10.10 Bcast:10.10.10.255 Mask:255.255.255.0
...... and more information.

To add on extra IP addresses type:

# ifconfig eth0:1 11.11.11.12 netmask 255.255.255.0

for additional IP addresses, make sure you increment the 1 in eth0:1, for example, a third IP address (third one including your BASE IP) would be added:

# ifconfig eth0:2 11.11.11.13 netmask 255.255.255.0

Hope it helps anyone struggling!

Windows COM Ports equivalent in Linux

Devices	Windows Com Port	Linux equivalent
Mouse	COM 1	/dev/ttyS0
External Modem	COM 2	/dev/ttyS1
Floppy Drive	Normal Floppy cable	/dev/fd0
Printer	Lpt Port	/dev/lp0
CDROM Drive	IDE cable	/dev/cdrom

What does this mean is, Com 1 in Windows is /dev/ttyS0 in Linux everywhere

How to quickly bind a range of IPs on RedHat based systems

In this short post I will show you how you can quickly add a range of IPs on any RedHat based system (Rhel, Centos, Fedora, etc). When you have to add many IPs to a system this can be quite handy and save a lot of time.

Normally when you add a new IP to a network interface in a RedHat based system you create a file ifcfg-eth0:x in /etc/sysconfig/network-scripts/. For example:

/etc/sysconfig/network-scripts/ifcfg-eth0:0
DEVICE=eth0:0ONBOOT=yesBOOTPROTO=staticIPADDR=192.168.0.100NETMASK=255.255.255.0NETWORK=192.168.0.0BROADCAST=192.168.0.255TYPE=Ethernet

Similar to the above example you can create several aliases. But what if you have to add a lot of IPs that are in a range like this? Let’s say that I want to add 100 IPs this way… this is possible, but not very effective, right? RedHat based systems offer a method to bind a range of IPs in a quick way allowing us to eliminate the need to create a lot of files and saving us time doing this.

Create a file /etc/sysconfig/network-scripts/ifcfg-eth0-range0 if this doesn’t exist, or just add to it if you already have it, the following lines: /etc/sysconfig/network-scripts/ifcfg-eth0-range0


IPADDR_START=192.168.0.100IPADDR_END=192.168.0.200CLONENUM_START=0

where: IPADDR_START is the first IP and IPADDR_END is the last IP in the range. CLONENUM_START is the number that will be assigned to the first IP alias interface (eth0:0 in this example).

If you need to add more ranges of IPs then just use a different file for ex. ifcfg-eth0-range1, for each one of the ranges. You need to be careful and use the proper CLONENUM_START to not overwrite other aliases. Once you have configured the range/s of IPs you just need to restart the network service in order to activate it:

service network restart