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Test Sendmail TLS Certificate
(2017-05-04) Problem Test Sendmail's TLS configuration. Solution $ openssl s_client -starttls smt...
tftp-server
(2018-01-12) Problem I need a tftp server on CentOS 7. Solution # yum -y install tftp-server xine...
VM Interface Bouncing
(2019-09-13) Problem VM transplanted between two VMware clusters. Ran fine in old cluster for two...
vsftp: 500 OOPS: chroot
Problem vsftpd in user chroot mode. When logging in, you get: 500 OOPS: chroot Solution You have...
docker
(2020-05-03) Docker on CentOS 8 # dnf config-manager --add-repo=https://download.docker.com/linux...
failed to load driver: swrast
(2021-08-17) Problem: Some variety of libGL error: MESA-LOADER: failed to open swrast: /usr/lib64...
Find Transparent Proxy Systems
(2021-02-17) Problem A system between me and my destination is doing proxying for the destination...
Installing From The Vault
(2022-02-01) Problem # sudo dnf (operation) Error: Failed to download metadata for repo 'appstrea...
Creating Custom Kernel RPMs
(Note: may not be relevant to CentOS-4, I stuck this here because the dates (2008) kinda lined up...
bind always returns SERVFAIL
(2013-04-16) Problem I have installed a bind instance from RPM and all it does is SERVFAIL. Debug...
Updating to PHP 5
Problem I have a user who wants PHP 5 on our server. Solution This is a horrible problem. Advice ...
SCSI Device Names And Bus IDs
Problem (Asked on SuperUser.com) I have a CentOS 4.x server running software raid. The server has...
Permitting rdate access
Letting rdate work from other machines # chkconfig time-stream on Add a rule to /etc/sysconfig/i...
NFS Support
Installing ntfs support for CentOS RedHat and CentOS do not include ntfs, possibly for legal reas...
I2O RAID Controller
Problem You has some variety of the Adaptec 2010s RAID SCSI controller installed. Solution CentOS...
End Of Life Repository Access
(7 August 2012) Problem Running a yum operation on CentOS 4, I get the error: not using ftp, http...
Dovecott: Internal Login Failure
Problem # telnet localhost 110 Trying 127.0.0.1… Connected to localhost.localdomain (127.0.0.1). ...
Configuration Preparation
(2015-08-24) This is the recipe that I use when configuring out-of-box systems for the first time...
DHCP Reservation
(2015-01-29) New way: config system dhcp server edit <instance_int> config reserved-address ...
Dual-WAN Gateways
Rules For Multiple Default Gateways If the two routes have different Administrative Distance set...