=== Updating default editor ===

   # update-alternatives --config editor

=== Disabling compcache in Ubuntu Jaunty (and Related Swap Errors) ===

This bug can also be seen if you are seeing errors like these:

<code>
Mar 6 17:27:29 server kernel: [14438.135859] compcache: Error allocating memory for compressed page: 60594, size=4096
Mar 6 17:27:29 server kernel: [14438.135871] Write-error on swap-device (254:0:484752)
Mar 6 17:27:29 server kernel: [14438.136813] allocation failed: out of vmalloc space - use vmalloc= to increase size.
Mar 6 17:27:29 server kernel: [14438.136824] compcache: Error allocating memory for compressed page: 60595, size=2093
Mar 6 17:27:29 server kernel: [14438.136835] Write-error on swap-device (254:0:484760)
Mar 6 17:27:29 server kernel: [14438.137088] allocation failed: out of vmalloc space - use vmalloc= to increase size.
Mar 6 17:27:29 server kernel: [14438.137098] compcache: Error allocating memory for compressed page: 60596, size=4079
Mar 6 17:27:29 server kernel: [14438.137108] Write-error on swap-device (254:0:484768)
</code>

You can also see it when you print swap information with the command swapon -s – if compcache is enabled, one of the swap entries will be “ramzswap”.

To disable compcache completely, do this:

   rm -f /usr/share/initramfs-tools/conf.d/compcache && update-initramfs -u

The file compcache contains this line – which is what enables (and sizes) compcache:

   COMPCACHE_SIZE="25%"

==== Optimize Dnsmasq in NetworkManager ====

create file
/etc/NetworkManager/dnsmasq.d/dnsmasq.conf 

with this content:

  all-servers
  cache-size=10000
  addn-hosts=/etc/hosts
  neg-ttl=3600
  local-ttl=3600
  bogus-priv

for /etc/hosts use [[:spam|Hosts adblocker]]