Ad Hoc Wireless Networking in Linux
https://help.ubuntu.com/community/WifiDocs/Adhoc

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echo 1 > /proc/sys/vm/block_dump
enables you to see via dmesg and syslog which application is accessign the disk and for doing what
blktrace
from blktrace package (sudo apt-get install blktrace) is also useful since it prompts you with those applications that access your hd the most. Use it this way:
bltrace /dev/sda

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using sysctl and sysfs to tweak /proc and /sys parameters can be useful in order to permanently set powertop suggestions or not to have to recompile the kernel for only one value change.
lm-profiler
helps disabling unneeded services
You can use sysctl to tweak the running kernel parameters (tweak /proc entries)
and /etc/sysctl.conf to apply these settings permanently
e.g. including [...]

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https://wiki.ubuntu.com/KernelTeamBugPolicies

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Creating a link within the same HTML document or to a specific fragment of another document is a two-step process. The first step is to make the target fragment; the second is to create the link to the fragment.
Use the <a> tag with its name attribute to identify a fragment. The value of the name [...]

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Come connettersi ad internet attraverso un’ADSL con cavo ethernet, nome utente e password (PPPoE)Connettersi ad internet con un cavo ethernet ed una connessione flat 24/7 è semplice quanto inserire il cavetto nell’apposita presa.
Leggermente più complesso è il procedimento se possiedi una connessione a tempo (in cui paghi in base a quanto tempo stai collegato). Infatti [...]

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How to connect to internet through an ADSL ethernet modem with username and password (PPPoE)
Connecting to internet with a flat connection is really as easy as pluggin in the ethernet cable.
Little more complex is when you have to log in since you pay per time your internet connection.
In order to set your username and [...]

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in order to automatically download missing authentication keys for third party apt-get repositories I suggest a handy script published by Trevino (I haven’t tested it yet though).
sudo apt-get update 2> /tmp/keymissing; for key in $(grep “NO_PUBKEY” /tmp/keymissing |sed “s/.*NO_PUBKEY //”); do echo -e “\nProcessing key: $key”; sudo gpg –keyserver subkeys.pgp.net –recv $key && sudo gpg [...]

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sudo apt-get install whowatch
Whowatch is an console, interactive users and process monitoring tool.It displays information about the users currently logged on to the machine, in real-time. Besides standard informations (login name, tty,host, userâs process), the type of the connection (ie. telnet or ssh) is shown. Display of users command line can be switch to tty [...]

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After having installed a new kernel (or an update version of it) or also other boot related stuff it is necessary to rebuild the initial ramdisk using the following command in order to get the changes effective:
update-initramfs -c -k $(uname -r)

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