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  1. Configuring ipmi using ipmitool

    Packages and Services

    On RHEL7Server the OpenIPMI and ipmitool are necessary to configure and use IPMI.

    $ yum install OpenIMPI ipmitool
    

    Networking

    $ sudo ipmitool lan set 1 ipsrc static
    $ sudo ipmitool lan set 1 ipaddr 203.0.113.45
    $ sudo ipmitool lan set 1 netmask 255.255.255.0
    $ sudo ipmitool ...
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  2. Reinstall the Kernel with yum

    After failing to update the initrd after making changes to the plymouth boot I was unable to boot into the kernel. The yum reinstall fixed this

    $ yum reinstall kernel
    

    However, this doesn't always work. If yum feels the kernel is already installed and healthy this will return 'nothing to ...

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  3. Have dovecot logins update lastlog

    Two changes are needed to have dovecot update lastlog when a user logins with either imap or pop3.

    In /etc/dovecot/cond.d/auth-system.conf.ext enable PAM sessions

    passdb {
      driver = pam
      args = session=yes dovecot
    

    Then, enable the lastlog module in the dovecot PAM configuration at /etc/pam.d ...

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  4. ss for netstat people

    Published: Wed 13 January 2016
    Updated: Wed 13 January 2016
    By Jon Moore

    In misc.

    Summary: ss is another utility to investigate sockets and is often seen as a replacement for netstat. This posts attempes to give a brief introduction to using ss in place of netstat Published: true

    Show all connections

    # ss | head -4
    Netid  State      Recv-Q Send-Q Local Address:Port                 Peer Address:Port ...
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