[Dovecot] master: Error: service(config): Initial status notification not received in 30 seconds, killing the process

If you’re running a very large dovecot config that takes a long time to load and dovecot won’t start you’re going to see this error: master: Error: service(config): Initial status notification not received in 30 seconds, killing the process In our case we have many certificates to load from the SNI configs. You’ll also see […]

[Active Directory/SSSD] [sssd[ldap_child[xxxxx]]]: Failed to initialize credentials using keytab [MEMORY:/etc/krb5.keytab]: Client ‘host/thisisaverylongdomainname.org@EXAMPLE’ not found in Kerberos database. Unable to create GSSAPI-encrypted LDAP connection.

This error can be caused by a few different reasons. In this particular case it’s a Centos 6 server connection to a Microsoft Active Directory 2016 DC. The short version of the story is that even though the FQDN has a valid key in the krb5 keytab it will only properly authenticate using the short […]

APC AP7862 Firmware Update Notes

With some firmware versions uploading new firmware via serial doesn’t work. The transfer will complete and the unit will reboot but it will still be running the old firmware. FTP transfer work well. Some older firmware can’t accept an FTP file transfer of the newest firmware. There is an older version packaged with the new […]


[Areca RAID] RAID configuration disappears

If you’ve had a previously configured Raid Set on an Areca RAID controller and it all of a sudden disappears it can sometimes be salvaged. In the RAID BIOS: Raid Set Function -> Rescue Raid You’re then prompted to “Enter the Operation Key.” This is ambiguous in the documentation and there’s also a mispelling for […]

[MySQL/MariaDB/CentOS 7] mysqldump: Couldn’t execute XXXXX (Errcode: 24 “Too many open files”) (23)

MySQL/MariaDB will sometimes hit its open file limit when doing large mysqldump operations. On a lot of distributions you can raise the limit by adding the following line to the /etc/my.cnf file and restarting the service: open_files_limit=XXXX This doesn’t work on systemd controlled database services so you need to add the following lines to /etc/systemd/system/mariadb.service.d/limits.conf […]

[Linux/quotacheck] quotacheck: Cannot stat directory //var/spool/exim_incoming/scan/1erAzg-0007eX-E1: No such file or directory

When running quotacheck on a filesystem that isn’t read only it will error out and not finish if it’s unable to stat a certain file or directory. It does this because it assumes that there’s a problem with the filesystem. If your mail software is actively processing mail when running quotacheck it will get an […]