Uly.me

cloud engineer

update

Yum Cache Corruption

If you’re getting a “HTTP Error 404 – Not Found” error when trying to run yum update, it could be a corrupted cache. Clear the cache on the system by running the following.

yum clean all
rm -rf /var/cache/yum/*

Run yum update again. The errors should be gone.

Install latest Sublime Text

How to install the latest version of the Sublime Text editor on Ubuntu or Mint.

wget -qO - https://download.sublimetext.com/sublimehq-pub.gpg | sudo apt-key add -
sudo apt-get install apt-transport-https
echo "deb https://download.sublimetext.com/ apt/stable/" | sudo tee /etc/apt/sources.list.d/sublime-text.list
sudo apt-get update
sudo apt-get install sublime-text

It will add the sublime-text.list file in /etc/apt/sources.list.d directory.

Apt Locked Files

If you tried to run apt update and you get this error, try the following.

$ apt update
E: Could not get lock /var/lib/dpkg/lock-frontend - open (11: Resource temporarily unavailable) [duplicate]

Kill the process.

$ sudo killall apt apt-get

If that doesn’t work, remove the locked files.

$ sudo rm /var/lib/apt/lists/lock
$ sudo rm /var/cache/apt/archives/lock
$ sudo rm /var/lib/dpkg/lock*

Run apt update again.

Check Reboot After Updates

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

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