Заметки админа

Russian author blog providing technical notes, how‑tos and troubleshooting on Linux system administration, mail and web services, firewalls and related server tools.

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Заметки админа is a Russian-language author blog focused on system administration topics. The site publishes posts about Linux server administration, mail server setup (postfix, dovecot, postfixadmin), webmail (RoundCube), firewall configuration (firewalld), RED OS/REDOS-related notes, KSC WebConsole, and other technical how‑to and troubleshooting notes targeted at sysadmins and IT professionals.