Install chkrootkit on CentOS or cPanel

install chkrootkit
install chkrootkit

What is chkrootkit and the steps to Install chkrootkit

The chkrootkit is a security scanner to check if the system is infected with the ‘rootkit’. A rootkit is a malicious software which is capable of having administrator-level access to a computer or network. The rootkit allows the hackers to take the control of a system without the user knowing it. This means that the rootkit is capable of executing files and changing system configurations on the target machine and much more which can be done only as the super user of the Linux machine.

Please note that scanning for rootkits will not stop all attacks, it is not an active defense. If your server has been compromised then a scan will not stop the rootkit.

Install chkrootkit

The following steps will help you to install chkrootkit on CentOS.

cd /usr/local/src
tar xvf chkrootkit.tar.gz
cd chkrootkit-*
make sense

Now, you can run the chkrootkit to scan the server. Please note that the present working directory should be “/usr/local/src/chkrootkit-0.50”.


Daily scan report script

Create a file named

vim /etc/cron.daily/

cd /usr/local/src/chkrootkit-*/ ; ./chkrootkit |grep -v not| /bin/mail -s 'CHROOTKIT Scan Result'

Make it executable

chmod +x /etc/cron.daily/

The script will email your daily scan report. Also, the above steps can also be used to install chkrootkit on cPanel server. Also, please keep this in mind that, using chkrootkit, you can’t remove and found 100% rootkits. You can secure your server from rootkits by ensuring that all applications and software are up-to-date and the system kept patched against all known vulnerabilities.

That’s it!

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  • Hello,

    Got the following error while installing chkrootkit. How to resolve this?

    # make sense
    cc -DHAVE_LASTLOG_H -o chklastlog chklastlog.c
    cc -DHAVE_LASTLOG_H -o chkwtmp chkwtmp.c
    cc -DHAVE_LASTLOG_H -D_FILE_OFFSET_BITS=64 -o ifpromisc ifpromisc.c
    cc -o chkproc chkproc.c
    cc -o chkdirs chkdirs.c
    cc -o check_wtmpx check_wtmpx.c
    cc -static -o strings-static strings.c
    /usr/bin/ld: cannot find -lc
    collect2: error: ld returned 1 exit status
    make: *** [strings-static] Error 1