389 notes on Linux, tools and troubleshooting
If connecting to a server over SSH fails with "no hostkey alg", as in the example below: debug1: Reading configuration data /etc/ssh_config debug1: Connecting to 192.168.1.1 [192.168.1.1] port 22.
A script to list users in every distribution list in the system, showing the results by distribution list, as in this example: ======= GROUP: dist1 ============= user1 ezy, [email protected]
If MySQL reports "Error: Cannot load from mysql.proc. The table is probably corrupted", its schema may be a different version from the running server.
A collection of links for checking hardware warranties. HP: http://h20564.www2.hp.com/hpsc/wc/public/home IBM: http://www-947.ibm.com/support/entry/portal/wlup
There are many ways to send mail from the Linux command line. For repeated system tests, netcat can send a prepared message with one command.
If you install zimbra 8.5.0 on Centos 7 or Red Hat Enterprise 7 and zmconfigd fails to start, as in this example: [zimbra@ezymailhosting ~]$ zmcontrol status Host mail.amarz.ne
EHLO (or HELO) identifies a host at the start of an SMTP protocol connection. In zimbra, you can change the EHLO (or HELO) sent to other smtp servers and set the greeting banner.
Linux network interfaces are commonly named eth0, eth1, ... ethx. These names do not describe the interface hardware, so they do not tell us what kind of hardware eth0 or eth1 is…
RHEL 7 changes its service manager from SysVinit to systemd, offering parallel operation, mount point handling, and cgroups support. These tables compare their commands.
