• Skip to main content

Uly.me

cloud engineer

  • Home
  • About
  • Search

redhat

Yum Version Lock

February 21, 2023

How to lock a package or software in RedHat.

# For RHEL 5
yum install yum-versionlock
# For RHEL 6 and 7
yum install yum-plugin-versionlock
# For RHEL 8 and 9
yum install python3-dnf-plugin-versionlock

# For RHEL 5 yum install yum-versionlock # For RHEL 6 and 7 yum install yum-plugin-versionlock # For RHEL 8 and 9 yum install python3-dnf-plugin-versionlock

Locking a package

yum versionlock gcc-*

yum versionlock gcc-*

List locked packages

yum versionlock list

yum versionlock list

Filed Under: Linux Tagged With: install, lock, package, redhat, versionlock, yum

Lock a Package in Linux

January 7, 2022

Here’s how to lockdown a package to a specific version.

Search for the current package.

$ sudo rpm -qa |  grep sdk
google-cloud-sdk-365.0.1-1.x86_64

$ sudo rpm -qa | grep sdk google-cloud-sdk-365.0.1-1.x86_64

Install versionlock.

yum install yum-plugin-versionlock

yum install yum-plugin-versionlock

Lock a package.

yum versionlock google-cloud-sdk-365.0.1-1.x86_64

yum versionlock google-cloud-sdk-365.0.1-1.x86_64

Display all locked versions.

yum versionlock list

yum versionlock list

Unlock and clear.

yum versionlock clear

yum versionlock clear

Filed Under: Linux Tagged With: lock, redhat, versionlock, yum

Check Reboot After Updates

July 16, 2021

Here’s the command to check if the system needs a reboot after running yum update.

Must be root or run it sudo.

$ needs-restarting -r ; echo $?
Core libraries or services have been updated:
  openssl-libs -> 1:1.0.2k-21.el7_9
  kernel -> 3.10.0-1160.31.1.el7
  dbus -> 1:1.10.24-15.el7
  linux-firmware -> 20200421-80.git78c0348.el7_9
  glibc -> 2.17-324.el7_9
  systemd -> 219-78.el7_9.3
 
Reboot is required to ensure that your system benefits from these updates.
 
More information:
https://access.redhat.com/solutions/27943
1

$ needs-restarting -r ; echo $? Core libraries or services have been updated: openssl-libs -> 1:1.0.2k-21.el7_9 kernel -> 3.10.0-1160.31.1.el7 dbus -> 1:1.10.24-15.el7 linux-firmware -> 20200421-80.git78c0348.el7_9 glibc -> 2.17-324.el7_9 systemd -> 219-78.el7_9.3 Reboot is required to ensure that your system benefits from these updates. More information: https://access.redhat.com/solutions/27943 1

In this instance, it requires a reboot due to a new kernel.

Filed Under: Linux Tagged With: centos, check, reboot, redhat, update

Set Timezone Permanently

March 18, 2021

It’s recommended to set the clock to UTC. In rare occasions, local time may be needed.

Here’s how to set your server’s timezone permanently.

Check the date first.

date

date

Backup localtime. Set it to US Eastern Time.

mv /etc/localtime /etc/localtime.backup
ln -s /usr/share/zoneinfo/America/New_York /etc/localtime

mv /etc/localtime /etc/localtime.backup ln -s /usr/share/zoneinfo/America/New_York /etc/localtime

Backup clock. Set it to US Eastern Time.

cp -p /etc/sysconfig/clock /etc/sysconfig/clock.backup 
> /etc/sysconfig/clock
echo ZONE=\"America/New_York\" > /etc/sysconfig/clock

cp -p /etc/sysconfig/clock /etc/sysconfig/clock.backup > /etc/sysconfig/clock echo ZONE=\"America/New_York\" > /etc/sysconfig/clock

Run the date again to validate.

date

date

Filed Under: Linux Tagged With: permanent, redhat, set, timezone

Install OpenJDK 8

January 31, 2021

Here’s the installation instructions for OpenJDK 8.

For Fedora, Redhat and Oracle Linux.

yum install java-1.8.0-openjdk

yum install java-1.8.0-openjdk

For Debian and Ubuntu.

apt-get install openjdk-8-jre

apt-get install openjdk-8-jre

To see if the packages (symbolic links) are there, they can be found in /etc/alternatives/, at least in Redhat 7.

ls -l /etc/alternatives/

ls -l /etc/alternatives/

Filed Under: Misc Tagged With: 1.8.0, centos, java, jdk, jre, redhat, ubuntu

  • Go to page 1
  • Go to page 2
  • Go to page 3
  • Go to Next Page »
  • Home
  • About
  • Search

Copyright © 2023