You set up a machine – but you set the wrong timezone, how to fix it? First confirm the current timezone [root@mysystem ~]# date Mon Jun 3 09:08:58 CDT 2019 We will use the tool timedatect to change it. Now … Continue reading →
I have had some problems with kernels, modules, drivers, services, etc causing Centos to lock up when the system boots. This is real annoying when it has that nice fancy graphical grey screen up with the spinning device at the … Continue reading →
First su – yum -y install tftp If you are running iptables either: iptables -I INPUT -s ip.address.tftp.server -p udp -m udp –dport 2000:2020 -j ACCEPT 0r systemctl stop iptables If you are running firewalld Execute the command to permit … Continue reading →
I have to deal with some older printers that dont have https:// set up on them – but every time I try to access them using Firefox – it changes the URL from http://printername.or.ip to https://printername.or.ip First – in the … Continue reading →
On my Centos 7 system, I wanted to find out which VM was taking up a large amount of the processor: top – 14:43:15 up 3 days, 7:49, 2 users, load average: 1.66, 1.79, 1.99 Tasks: 442 total, 1 running, … Continue reading →
Running ssh across a vpn connection I started having my ssh sessions fail to connect. After starting ssh with the “-vvv” option, the session would timeout after getting a debug1: expecting SSH2_MSG_KEX_ECDH_REPLY After doing some research, I found other people … Continue reading →
Note: You need supervisor privileges to make this change. Select the power icon in the upper right corner. Select your username from the drop down list Select Account Settings form under your username Select the Unlock button at the top of … Continue reading →
Update!! Use these instructions instead: https://docs.fedoraproject.org/en-US/Fedora/23/html/System_Administrators_Guide/sec-Configuring_GRUB_2_Using_the_grubby_Tool.html A typical CentOS 7 Linux system has multiple kernels. How many kernels you have in your CentOS systems depends on the configuration setting. Sometimes you might feel the need to change the … Continue reading →
Fix your logon prompt for when you are on the console of your Linux server (Centos 6 runlevel 3 or Centos 7 multi-user.target) so that it displays your current ip address Edit /etc/rc.d/rc.local and add the following lines to the end … Continue reading →
To start or stop virtual machines using ssh or the console, you will need to use the bash prompt. There is more than one way, but this is the way I prefer First check which virtual machines are available: virsh … Continue reading →