Linux Archives - Systems Administration Problem Solvers

SSHD mm_request_send: write: Broken pipe

Posted on November 22, 2015 by admin

You are attempting to login to a Linux machine (probably CentOS) and your SSH sessions are instantly disconnected. /var/log/secure shows various Signal 15 crashes and this error: mm_request_send: write: Broken…

Connect Error (2000) mysqld cannot connect to MySQL 4.1+ using old authentication ERROR 2049 (HY000): Connection using old (pre-4.1.1) authentication protocol refused

Posted on October 19, 2015October 19, 2015 by admin

You are receiving these errors: Connect Error (2000) mysqld cannot connect to MySQL 4.1+ using old authentication ERROR 1275 (HY000): Server is running in --secure-auth mode, but 'dbname'@'localhost' has a…

IPTABLES Tidbits

Posted on August 10, 2011December 27, 2011 by admin

List off all the rules in order. This helps to see if an allow is overriding one of your denies: iptables -nvL --line-numbers Reject or Drop? Drop means to drop…

Setup NIS + Red Hat + CentOS + Linux

Posted on May 23, 2011December 27, 2011 by admin

[ad 3] The following describes a procedure to set up NIS network name service under Red Hat Linux. This is geared toward a small intallation with only one domain. However,…

ssh: Illegal -o parameter “PermitLocalCommand no”

Posted on September 29, 2010December 27, 2011 by admin

Your box has been hacked. Refer to my previous post: HERE You need to reinstall the SSH client: yum reinstall openssh-clients

Common CentOS Run levels

Posted on March 29, 2010March 29, 2010 by admin

Common services and their run levels for auto start httpd: chkconfig --level 234 httpd on named: chkconfig --levels 35 named on vsftpd: chkconfig --level 234 vsftpd on -level 234 is…