Updating Kernel on Oracle Linux with Ksplice
Oracle Linux come with Ksplice, it allow you to upgrade Kernel with out rebooting. To update kernel, run uptrack-upgrade Example
linux
Install clamav Antivirus on CentOS 7
ClamAV is provided by the EPEL repo. Install epel repo yum install -y epel-release Install ClamAV with yum install clamav Back to…
Ubuntu 18.04 MariaDB 10.2 Too many open files
On my computer running Ubuntu 18.04, MriaDB stopped working. PHP application i run on my computer failed with error SQLSTATE[42S02]: Base table…
OpenLiteSpeed
OpenLiteSpeed is an open-source version of the popular commercial web server LiteSpeed. OpenLiteSpeed contains all of the essential features found in LiteSpeed…
Linux whois command
Linux whois command is used to find who owns a domain or IP address. To see information about a domain, use whois…
CentOS 7 Grub 2
To regenerate grub config on CentOS 7, run grub2-mkconfig -o /boot/grub2/grub.cfg If you use UEFI, run grub2-mkconfig -o /boot/efi/EFI/centos/grub.cfg OVH CentOS 7…
How to reinstall packages using yum
To reinstall a package with yum, run yum reinstall PKG_NAME Example yum reinstall kernel
Monitor Server with Prometheus and Grafana
Prometheus is used an open source software, that can collect metrics and alerting. You can download latest version oof Prometheus from https://prometheus.io/download/…
PHP Script to monitor Apache/php-fpm
I moved a web site to new dedicated server. But for some reason, php-fpm crashed. I increased the max_children settings, but it…
Install SSL for ISPConfig Control Panel
To add SSL for ISPConfig control panel, add the server hostname as a website in ISPConfig and enable the LetsEnrypt checkbox. You…
Apachectl
apachectl command is used to interact with Apache web server. To see Apache status apachectl status To list virtualhost info, run apachectl…
VestaCP SSL for mail server
VestaCP install self signed SSL for mail server by default. To install valid SSL, login to VestCP, go to sites. You will…