MCE hardware error cpu 0

1.0 Error

Error

While running Ubuntu 18.04.1 on a laptop, the following errors were observed.

mce: hardware error cpu 0 machine check 0 bank 6 ae0000000040110a
mce: hardware error tsc 0 addr ffb07540 misc 238a0000086
mce: hardware error processor 0:40651 time 1540082330 socket 0 Apic 0 microcode 24
ipmi dmi invalid offset 0

The system would stop in the single user mode.… Read more

Failed to fetch webpage, temporary failure resolving domain

1.0 Error

While configuring a Linux server, the error Failed to fetch webpage, temporary failure resolving domain was observed.

$ sudo apt-get update
Err:1 http://mirrors.xxxxxx.com/ubuntu bionic InRelease
  Temporary failure resolving 'mirrors.xxxxxx.com'
Err:2 http://mirrors.xxxxxx.com/ubuntu bionic-updates InRelease
  Temporary failure resolving 'mirrors.xxxxxx.com'
Err:3 http://mirrors.xxxxxx.com/ubuntu bionic-backports InRelease
  Temporary failure resolving 'mirrors.xxxxxx.com'
Err:4 http://security.ubuntu.com/ubuntu bionic-security InRelease
  Temporary failure resolving 'security.ubuntu.com'
Reading package lists...
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Error while executing the dig command

1.0 Error

While executing the dig command, the sendmsg() failed: Operation not permitted error was printed.

$ dig example.com
../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
../../../../lib/isc/unix/net.c:581: sendmsg() failed: Operation not permitted
...

2.0 Solution

The error was resolved after adding the following iptables rules.… Read more