How to Install Webmin on CentOS/RHEL 7

Webmin is a web-based interface for system administration for Centos / RHEL and mostly other distribution as well. User accounts, Apache, DNS, file sharing and other services can be managed by web browser using webmin tool.

Gitlab Server Community Edition (CE) Backup and restore

Backup Steps for Gitlab Omnibus installations:

A backup creates an archive file that contains the database, all repositories and all attachments. The filename will be [TIMESTAMP]_gitlab_backup.tar and default backup/restore directory is var/opt/gitlab/backups. This timestamp can be used to restore an specific backup.  You can only restore a backup to exactly the same version of GitLab Server. You need to keep a separate copy of /etc/gitlab/gitlab-secrets.json . This file contains the database encryption key used for two-factor authentication.

How to install sar, sadf, mpstat, iostat, pidstat and sa tools on CentOS / RHEL

Install sar, sadf, mpstat, iostat, pidstat and sa tools on CentOS  / RHEL

The following command can be used to install sar, sadf, mpstat, iostat, pidstat and sa tool:

How to Install Gitlab on CentOS/RHEL 7

GitLab is a open source web-based Git repository manager and issue tracking features. Git repository provides user/group management, code reviews, issue tracking, activity feeds and wikis. It comes with GitLab CI for continuous integration and delivery.

Ho to Install Gitlab Server dependencies

For Gitlab operation we need to configure mail service on Gitlab server. Use any mail services like sendmail, postfix or other SMTP servers etc. In this post we are using postfix email service for sending emails.

Sendmail issue on CentOS 7 (Log permission denied in /var/log/maillog)

Apache/PHP on CentOS 7 unable to send emails using sendmail

See log in /var/log/maillog file should shows following error: