Virus knowledge under Linux

First, the Linux platform virus type

At present, the virus under the Linux platform is divided into the following 4 major categories:

(1) executable file virus, which can be parasitic in the file as the main object of infection of the virus.

(2) worm (worm) virus, Linux platform worm virus is rampant, such as the use of system vulnerabilities spread ramen, lion, slapper, and so on, these viruses are infected with a large number of Linux systems, causing huge losses.

(3) Script viruses, more for the use of the shell script language of the virus, such a virus writing is simpler, but the destructive power is equally amazing, like the. Sh end of the script file, a short dozens of lines of shell script can infect the hard drive all the script files in a short time.

(4) Backdoor procedures, from the increase of the system Super user account of the simple back door to the use of system services loaded, shared library file injection, Rootkit Toolkit, and can even load the kernel module (LKM) and generated by the backdoor, Linux platform under the backdoor technology development is very mature, strong concealment, difficult to clear has become a serious headache for Linux system administrators.

Second, the Llinux platform under the anti-virus software

The antivirus software under Linux is mainly divided into two parts based on open source anti-virus software and commercial anti-virus software, the former is Anti Vir Linux of Germany Sebastian, H+bedv antivir/x, the latter includes GeCAD Software Virus Desktop for Linux V8.

In addition, despite the rapid development of Linux desktop applications, the command line (shell) still has a strong vitality in Linux, because the launch of the X-window manager will also consume a lot of system resources. So, the author focuses on how to use anti Linux at the command line to check the virus.

Small Tips

Anti Linux is the German Sebastian, H+bedv antivir/x Company for Linux antivirus software, can kill a variety of worms, boot zone virus, StarOffice macro virus, the latest version is 2.0.9.

Linux is stable, inexpensive, and very secure relative to Windows systems. If it is not superuser, programs that maliciously infect system files are difficult to succeed, and viruses are rarely found to spread on Linux. But that's not to say that Linux is really flawless.

Today, more and more servers, workstations and PCs are starting to use Linux, and computer virus makers are starting to attack the system. Although the powerful computer viruses we know do not damage Linux servers, they can be propagated to computers that have Windows installed in contact with it. In the actual work of the virus often reside in the Linux system, although it does not harm the system, but it can act as the headquarters of the Windows system virus, the killing network of Windows virus becomes a very difficult thing.

Third, the Linux platform virus type

At present, the virus under the Linux platform is divided into the following 4 major categories:

(1) executable file virus, which can be parasitic in the file as the main object of infection of the virus.

(2) worm (worm) virus, Linux platform worm virus is rampant, such as the use of system vulnerabilities spread ramen, lion, slapper, and so on, these viruses are infected with a large number of Linux systems, causing huge losses.

(3) Script viruses, more for the use of the shell script language of the virus, such a virus writing is simpler, but the destructive power is equally amazing, like the. Sh end of the script file, a short dozens of lines of shell script can infect the hard drive all the script files in a short time.

(4) Backdoor procedures, from the increase of the system Super user account of the simple back door to the use of system services loaded, shared library file injection, Rootkit Toolkit, and can even load the kernel module (LKM) and generated by the backdoor, Linux platform under the backdoor technology development is very mature, strong concealment, difficult to clear has become a serious headache for Linux system administrators.

Four, the Linux platform anti-virus software

The antivirus software under Linux is mainly divided into two parts based on open source anti-virus software and commercial anti-virus software, the former is Anti Vir Linux of Germany Sebastian, H+bedv antivir/x, the latter includes GeCAD Software Virus Desktop for Linux V8.

In addition, despite the rapid development of Linux desktop applications, the command line (shell) still has a strong vitality in Linux, because the launch of the X-window manager will also consume a lot of system resources. So, the author focuses on how to use anti Linux at the command line to check the virus.

Small Tips

Anti Linux is the German Sebastian, H+bedv antivir/x Company for Linux antivirus software, can kill a variety of worms, boot zone virus, StarOffice macro virus, the latest version is 2.0.9.

V. Use of SAMBA technology to assist antivirus

We typically use Samba for file sharing, and it works well with computers that use Windows operating systems. From a computer with Windows, Samba's server is a server displayed in the Network Neighborhood, and we can save Windows files on this server. Also, we can hook up other Windows computer shares to the Samba directory, and do the virus killing together. The specific steps are as follows:

(1) Mapping network drives

As we know, the shared directory can be mapped to a network drive under Windows so that the shared directory can be used as a local folder. There are similar features in Linux that can be implemented with the help of the Smbmount command.

First, create a directory under the/MNT directory, assuming it is/mnt/smb/a1, and then killing a computer virus like a local file system.

#smbmount//a1/d/mnt/smb/a1 
#cd/mnt/smb/a1 
#antivir

(2) Uninstall the mapping directory, you can use the Umonut command, and then mount other computers to check the virus, the same method, no longer detailed here.

Vi. Summary

Viruses are very annoying to network administrators, so whether using the Windows operating system or the Linux operating system, we have to maintain a good mentality, more online learning advanced knowledge, through this article we learned a variety of ways to use the command line in the Linux system antivirus. This can be more handy to drive the virus out of our network, so that work and study life more smoothly.