Uly.me

cloud engineer

You are here: Home / Archives for redhat

Yum Repo Plugins

Here’s how to disable plugin in Yum repos.

# check which plugins are enabled
yum repolist
# disable plugins
yum update --disableplugin=product-id,subscription-manager
# check agin
yum repolist

If that doesn’t work, check the individual config files of each plugin.

cd /etc/yum/pluginconf.d/
vim product-id.conf
vim subscription-manager.conf

Disable it.

[main]
enable=0

Create Swap Disk

To see which disk is available for swap disk use.

lsblk
blkid
df -Th

Format the disk.

fdisk /dev/xvda

Create a swap disk.

sudo mkswap -f /dev/xvda
sudo swapon -s /dev/xvda
# or
sudo swapon /dev/xvda

Check if swap disk is available.

lsblk
free -h 
cat /proc/swaps
cat /proc/meminfo
swapon -s
top
vmstat
vmstat 1 5

Redhat Needs Restarting

Here’s the command to determine if a host needs rebooting after system updates in Redhat.

$ needs-restarting