Hand out the time zone from your ISC DHCP Server Add the following lines to the top of your dhcpd.conf file option PCode code 100 = text; option TCode code 101 = text; option PCode “EST5EDT4,M3.2.0/02:00,M11.1.0/02:00”; option TCode “America/NewYork”; … Continue reading →
1. Append below lines in /etc/sysctl.conf: net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 NOTE : To disable IPv6 on a single interface replace “all” on the first line with “eth0” or the name of the selected ethernet interface 2. To make … Continue reading →
Using Firewall-cmd to check firewall current state If you want to verify the current state of firewall then you need to use –state option with firewall-cmd command to check that. As you can see from below output, firewalld is currently … Continue reading →
Centos 7 yum -y install epel-release yum -y groupinstall “GNOME Desktop” yum -y install xrdp xorg-x11-xinit firewall-cmd –permanent –zone=public –add-port=3389/tcp firewall-cmd –reload systemctl start xrdp.service systemctl enable xrdp.service Centos 6 rpm -Uvh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm wget -O epel6.key.txt ‘http://keys.gnupg.net:11371/pks/lookup?search=0x0608B895&op=get’ rpm –import epel6.key.txt … Continue reading →
Revised: How to migrate a kvm guest from one host to another. These instructions are for moving a guest machine from one host to another host where the storage is on the host (instead of external storage that can be … Continue reading →
I set up my LetsEncrypt renewal cron to run just once a week. This causes certwatch to trip because it is set to alarm on any cert that needs to be renewed in < 30 days. to adjust the Certwatch … Continue reading →
You will need console access – either a physical keyboard and monitor locally, or using the Virtual Machine remote console. You will need to be able to control the boot process. Reboot the machine. When the bootloader selection screen … Continue reading →
If you have sufficient disk space and you are running Code42/Crashplan pro and you get “Error: No space left on device” when you use systemctl, this may be the fix Linux performs real-time file watching using the inotify API. Inotify … Continue reading →
I have a few boxes that have built in wifi and I dont need it turned on. So I turn it off using the following command nmcli radio wifi off To make sure the wifi radio stays turned off in … Continue reading →
You go to ssh to a system and you get the following message @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ @ WARNING: POSSIBLE DNS SPOOFING DETECTED! @ @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ The ECDSA host key for server.domain.com has changed, and the key for the corresponding IP address 10.128.15.2 is … Continue reading →
