Christopher Juckins

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centos_8_migration_notes [2020/09/30 11:53] – juckinscentos_8_migration_notes [2020/10/08 08:30] – juckins
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   * Disable WiFi LAN connection with ''# nmcli radio wifi off''   * Disable WiFi LAN connection with ''# nmcli radio wifi off''
   * [[https://unix.stackexchange.com/questions/152691/how-to-disable-beep-sound-in-linux-centos-7-command-line|Disable bell]]   * [[https://unix.stackexchange.com/questions/152691/how-to-disable-beep-sound-in-linux-centos-7-command-line|Disable bell]]
- 
-13 December 2016: 
-  * VM machine #1 failed to boot into kernel-3.10.0-514.2.2.el7.x86_64 
-    * Yum had hung up when updating open-vm-tools and I did a ''CTRL-C'' (bad move) 
-    * Booting machine into previous kernel had no network connection; rebooting once again got network up 
-    * RPM database completely hosed; had to erase this VM and restore from backup 
-  * VM machine #2 was a clone of a test CentOS 7 VM (v7.2.1511) and it got stuck on trying to update ''open-vm-tools-10.0.5-2.el7.x86_64'' 
-    * cancelled by CTRL-C 
-    * had to install "yum-utils" and run ''yum-complete-transaction'' 
-    * yum then failed because transaction size changed 
-    * ran ''package-cleanup --dupes'' 
-    * ran ''package-cleanup --problems'' 
-    * ran ''package-cleanup --cleandupes'' 
-    * Still a mess, ran ''yum check'' and too many errors to fix 
-    * Erased VM 
-  * VM machine #3 was clone of test CentOS 7 VM (v7.2.1511) 
-    * tried to remove open-vm-tools - hung up so aborted attempt 
-  * VM machine #4 test was clone of test CentOS 7 VM (v7.2.1511) 
-    * ''yum update --exclude=open-vm-tools*'' 
-    * machine updated and booted into new kernel normally 
-    * ran ''yum -y update'' 
-      * stalled again 
-      * ''top -d 2'' showed high CPU usage for process "vmware-checkvm" 
-      * **did ''ps -ef |grep vmware''** 
-      * **saw this process: ''root      3186  3182 97 17:08 pts/0    00:07:55 /usr/bin/vmware-checkvm''** 
-      * **issued ''kill 3186'' and the yum update completed** 
-  * Primary machine updated OK 
-    * Virtual Box VMs would not start 
-    * Had to run as root ''/sbin/rcvboxdrv setup'' 
- 
-5 June 2016: 
-  * Primary system migrated 
- 
-18 May 2016: 
-  * Xfce Power Manager icon appeared in task bar 
-    * Might be a way to configure screen blanking  
- 
-5 April 2016: 
-  * NUX repository needed for rdesktop 
-    * https://www.certdepot.net/rhel7-install-nux-repository/ 
-    * xfreerdp doesn't always authenticate to Windows 7 hosts 
- 
-16 February 2016: 
-  * High CPU usage for vmtoolsd process 
-    * removed open-vm-tools-desktop 
-    * rebooted; open-vm-tools still remained but did not use high CPU 
- 
-Restarting Services: http://www.putorius.net/2014/07/restarting-services-in-red-hat-7-or.html 
  
 For migrating a system from a different OS, take note of this info first: For migrating a system from a different OS, take note of this info first:
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   * Best to run the script by establishing SSH connection to box from a different machine.   * Best to run the script by establishing SSH connection to box from a different machine.
   * Pipe output to log file and tail the log file   * Pipe output to log file and tail the log file
-  * [[Yum installer bash script (CentOS7)|Copy this source to a .bash and run as root]]+  * [[yum_installer_bash_script_centos8|dnf installer bash script (CentOS 8)]]
  
 [[install_configure_cpan|CPAN packages]] to install: [[install_configure_cpan|CPAN packages]] to install:
centos_8_migration_notes.txt · Last modified: 2022/06/08 16:03 by juckins