centos_8_migration_notes
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| centos_8_migration_notes [2020/09/30 11:52] – juckins | centos_8_migration_notes [2020/10/14 16:40] – juckins | ||
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| Line 7: | Line 7: | ||
| * Disable WiFi LAN connection with ''# | * Disable WiFi LAN connection with ''# | ||
| * [[https:// | * [[https:// | ||
| - | |||
| - | 16 May 2020: | ||
| - | * System randomly reboots when KVM toggles back and forth from Dell XPS 8930 (running CentOS 7 as ' | ||
| - | * Noticed monitoring emails not being sent from tidewater; postfix not running and won't start. mysql error. | ||
| - | * yum reinstall < | ||
| - | * postfix started | ||
| - | * Other trouble...had to completely uninstall PHP | ||
| - | * Reinstall PHP - that is v5.4 | ||
| - | * Then upgrade to REMI php v7.4 | ||
| - | * Look in the bash setup script to install the needed php files | ||
| - | * Restore / | ||
| - | * restart httpd service | ||
| - | * yum update had many instances of 'empty files' | ||
| - | * ldconfig gave errors for 2 more things | ||
| - | * yum reinstall oniguruma5 | ||
| - | * yum reinstall oniguruma | ||
| - | * reboot system, came up cleanly | ||
| - | * may need to check if mysql connection limit needs to be increased | ||
| - | |||
| - | |||
| - | 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 '' | ||
| - | * 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 '' | ||
| - | * cancelled by CTRL-C | ||
| - | * had to install " | ||
| - | * yum then failed because transaction size changed | ||
| - | * ran '' | ||
| - | * ran '' | ||
| - | * ran '' | ||
| - | * Still a mess, ran '' | ||
| - | * 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) | ||
| - | * '' | ||
| - | * machine updated and booted into new kernel normally | ||
| - | * ran '' | ||
| - | * stalled again | ||
| - | * '' | ||
| - | * **did '' | ||
| - | * **saw this process: '' | ||
| - | * **issued '' | ||
| - | * Primary machine updated OK | ||
| - | * Virtual Box VMs would not start | ||
| - | * Had to run as root ''/ | ||
| - | |||
| - | 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:// | ||
| - | * xfreerdp doesn' | ||
| - | |||
| - | 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:// | ||
| 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: | ||
| - | * Make a test user on CentOS6 | + | * Make a test user on CentOS7 |
| * Compare hidden files to see if anything changed between OSs | * Compare hidden files to see if anything changed between OSs | ||
| + | * This allows for easy migrating of data for users' $HOME directories | ||
| * ensure all scripts make their own log file directory | * ensure all scripts make their own log file directory | ||
| * $log_dir = "/ | * $log_dir = "/ | ||
| * mkdir (" | * mkdir (" | ||
| * should crons write to /tmp and then have a daily script that checks cron logs for errors? | * should crons write to /tmp and then have a daily script that checks cron logs for errors? | ||
| - | * users | + | * Get inventory of users |
| + | * | ||
| + | * Check that PHP is working correctly, localhost/ | ||
| + | * | ||
| * <color # | * <color # | ||
| - | * [[https:// | + | |
| + | * [[https:// | ||
| + | | ||
| + | * Note that the restore of mysql does not use " | ||
| * [[https:// | * [[https:// | ||
| * [[http:// | * [[http:// | ||
| Line 341: | Line 281: | ||
| </ | </ | ||
| - | yum -y update, reboot, verify latest kernel is loaded by GRUB | + | dnf -y update, reboot, verify latest kernel is loaded by GRUB |
| Only keep 1 old kernel | Only keep 1 old kernel | ||
| Line 354: | Line 294: | ||
| Add 2nd hard drive to /etc/fstab [[adding_a_second_hard_drive|following these notes]] | Add 2nd hard drive to /etc/fstab [[adding_a_second_hard_drive|following these notes]] | ||
| - | Prepare to run the local yum installer script | + | Prepare to run the local dnf installer script |
| * Also installs [[https:// | * Also installs [[https:// | ||
| * 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 |
| [[install_configure_cpan|CPAN packages]] to install: | [[install_configure_cpan|CPAN packages]] to install: | ||
| Line 446: | Line 386: | ||
| Setup ddclient: | Setup ddclient: | ||
| * https:// | * https:// | ||
| - | * yum -y install ddclient | + | * dnf -y install ddclient |
| * Use / | * Use / | ||
| Line 492: | Line 432: | ||
| [[http:// | [[http:// | ||
| < | < | ||
| - | # yum install google*fonts | + | # dnf install google*fonts |
| </ | </ | ||
| * open Chrome, go to Settings > Advanced and set fonts as follows: | * open Chrome, go to Settings > Advanced and set fonts as follows: | ||
| Line 552: | Line 492: | ||
| < | < | ||
| - | yum install alsa-plugins-pulseaudio.i686 qt.i686 1: | + | dnf install alsa-plugins-pulseaudio.i686 qt.i686 1: |
| rpm -Uvh http:// | rpm -Uvh http:// | ||
| - | yum localinstall http:// | + | dnf localinstall http:// |
| </ | </ | ||
| Line 566: | Line 506: | ||
| * Update to openssh seems to require RSA keys now and authorized_keys file instead of DSA keys and authorized_keys2 file | * Update to openssh seems to require RSA keys now and authorized_keys file instead of DSA keys and authorized_keys2 file | ||
| * Set " | * Set " | ||
| - | * < | + | * < |
| * < | * < | ||
| * < | * < | ||
| Line 615: | Line 555: | ||
| * Use ' | * Use ' | ||
| * [[https:// | * [[https:// | ||
| - | * yum install cups | + | * dnf install cups |
| * service cups start | * service cups start | ||
| * systemctl enable cups | * systemctl enable cups | ||
| Line 622: | Line 562: | ||
| * Default printer driver works OK | * Default printer driver works OK | ||
| * Or use web browser: | * Or use web browser: | ||
| - | * # yum install httpd | + | * # dnf install httpd |
| * # / | * # / | ||
| - | * # yum install system-config-firewall | + | * # dnf install system-config-firewall |
| * # firewall-config (or System > Administration > Firewall) | * # firewall-config (or System > Administration > Firewall) | ||
| * Allow http and https as rules | * Allow http and https as rules | ||
centos_8_migration_notes.txt · Last modified: 2022/06/08 16:03 by juckins