Problems

When you try to restart or start a service you got the following message ?

shell-init: error retrieving current directory: getcwd: cannot access parent directories: No such file or directory 

Simple cd command such as cd or cd / will solve the problem

How to edit the resources of previously created VPS "test_vps" by KVM ?

# virsh dumpxml test_vps --> /tmp/test_vps.xml

# virsh undefine test_vps

# vim /tmp/test_vps.xml --> Edit what you want

i.e 2 GB RAM VPS with be increased to 4 GB as follow

  memory 2097152 memory
currentMemory 2097152 currentMemory

4096  * 1024 = 4194304 Byte --> The value should be in bytes

   memory 4194304 memory
   currentMemory 4194304 currentMemory

 # virsh define /tmp/test_vps.xml

 

How to enable and disable autostart feature in KVM of a given domain ?

# virsh autostart --> To enable
# virsh autostart --disable   --> To distable

How to install HP printer driver in Linux ?

# yum install hplip hplip-gui cups system-config-printer
Note:- Make sure that your printer is connected properly
# hp-setup --> Follow the instructions
Note:- use system-config-printer command or Cups server "127.0.0.1:631" to tweak the configurations and settings of the printer and add it as default printer then restart the printer manually.

When Webalizer reads its config file you got the following error ?

# webalizer -c /etc/webalizer.conf
Warning: Truncating oversized username
Skipping bad record (3009)
Warning: Truncating oversized username
Skipping bad record (3010)
Warning: Truncating oversized username
Skipping bad record (3011)
No valid records found!

 Check the following directives in /etc/webalizer.conf

LogFile        /var/log/squid/access.log
LogType squid

Here webalizer will analyze the squid log so the LogType directive should be squid. The default is http clf "Common Log Format"

 

In kickstart installation if you got the following error

tried to use undefined partition pv.01...

Basically your problem is you are trying to make a volume group on a physical volume which does not exist
you have to add the following line in ks.cfg file "part pv.qmo1C9-71pg-1d5r-tNxU-khs2-xdQQ-10Ma2z --grow --size=1" beneath the clearpart line
or as my case the it existed but was miss placed and you have to move it right below clearpart line

Failed to Add Image in glance

Error
Failed to add image. Got error:


The request returned 500 Internal Server Error

Solution:
Fix the OS ENV variables (insert your values from your API configs.)
e.g.

# vim ~/.bashrc

OS_AUTH_URL=”http://localhost:5000/v2.0/”
OS_PASSWORD=”password”
OS_TENANT_NAME=”admin”
OS_USERNAME=”admin”

# source ~/.bashrc