Generate a new UUID for ethernet interface
# uuidgen ifcfg-eth0 e62680c3-f5f5-4f06-b862-68e00e3b4506
Continue reading →SEEI
Authentication is required to create a color managed device in XRDP
Authentication is required to create a color managed device The error sometimes seen in CentOS 7.x remote connect via xRDP. Workaround Add the following content to file allow-colord.pkla File /etc/polkit-1/localauthority/50-local.d/allow-colord.pkla [Allow colord for all users] Identity=unix-user:* Action=org.freedesktop.color-manager.create-device;org.freedesktop.color-manager.create-profile;org.freedesktop.color-manager.delete-device;org.freedesktop.color-manager.delete-profile;org.freedesktop.color-manager.modify-device;org.freedesktop.color-manager.modify-profile ResultAny=yes ResualtInactive=auth_admin … Continue reading →
Disable Network Proxy Authentication Popup In XRDP
Disable Network Proxy Authentication Popup There is a specific issue that causes users to receive a popup asking for the root password after logged on. The below workaround will work for CentOS 7.x and 6.x too. Workaround Create a … Continue reading →
Laptop will not suspend when lid is closed in Gnome 3
Check these two items in the /etc/systemd/logind.conf PowerKeyIgnoreInhibited=yes SuspendKeyIgnoreInhibited=yes Tested with Centos 7
Continue reading →Gnome 3 Tricks for Centos 7
I started using Gnome 3 on Centos 7 because the bluetooth support was not complete in Mate. I discovered several items to make it work better. yum install gnome-shell-browser-plugin This will allow you to easily install the gnome extensions from … Continue reading →
Cacti Graph Titles Including ifAlias
Change the default title for graphs in cacti The following works with Cacti 1.2.5 (You either have to manually do this before you create your graphs, or you get to edit your graph definitions manually after the fact.) Console -> … Continue reading →
XRDP service wont start on Centos 7
You execute: systemctl start xrdp and the service does not start and you find the following in the messages log Apr 7 16:01:22 myserver systemd: Started xrdp session manager. Apr 7 16:01:22 myserver systemd: Starting xrdp session manager… Apr 7 … Continue reading →
DRBD on Centos
Installation Centos 7 rpm –import https://www.elrepo.org/RPM-GPG-KEY-elrepo.org rpm -Uvh http://www.elrepo.org/elrepo-release-7.0-2.el7.elrepo.noarch.rpm yum -y install drbd84-utils kmod-drbd84 Centos 6 rpm –import http://elrepo.org/RPM-GPG-KEY-elrepo.org rpm -Uvh http://elrepo.org/elrepo-release-6-5.el6.elrepo.noarch.rpm rpm -Uvh http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm rpm –import ‘http://keys.gnupg.net:11371/pks/lookup?search=0x0608B895&op=get’ yum -y install drbd84-utils kmod-drbd84 Configuration create /etc/drbd.d/drbd1.res resource repdata { protocol … Continue reading →
Error! Attribute zimbraGalAccountId of domain SomeDomain.com references an invalid account ID: (some long hex number)
If you get this message there is a good chance the GalSync account for the domain has been deleted. To correct this issue, you need to ssh to the zimbra server (or if you are running zimbra on multiple servers … Continue reading →
Limit which local users can use postfix
Compromised web sites can be used to relay spam email. To limit that or track which web sites are being used to send spam, you can limit which users can us sendmail, you can do the following. As root: Create … Continue reading →