There are many options for scanning your server for viruses or malware. One of them is the ClamAV software.
1. Installing ClamAV on CentOS
To install ClamAV on CentOS, run the following command:
yum install clamav clamd
2. Refreshing the Virus Database
After installation, refresh the virus database with the following command:
freshclam
You can schedule this command as a cron task to update the virus database periodically.
3. Scanning the Entire Server for Viruses
To scan the entire server for viruses, execute the following command:
ionice -c3 nice -n 19 /usr/bin/clamscan -r --bell -i /
The ionice and nice commands are used to minimize the impact of scanning on other applications running on the server.
Warning: Scanning the root directory (/) can be resource-intensive and may temporarily affect server performance. Schedule scans during off-peak hours if possible.