Basic commands for working with VI (and VIM)

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Some more basic commands for GNU/Linux - BSD

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Some basic commands for GNU/Linux - BSD

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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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in order to create password protected archives in linux you should use the shell since GNOME contextual menu does not provide this feature yet.
rar
rar a -hp archive_name.rar folder_or_file_to_compress
7zip
7z a -mhe=on -p archive_name.7z folder_or_file_to_compress

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you maybe wonder how those UUID inside /etc/fstab have been computed.
blkid /dev/sda8
simply does the job (where sda8 is the device you want the UUID computed for)
They are unique ids (thus the acronym) and are computed by program blkid which can easily be invoked via shell in order to update those IDs in case you [...]

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updatedb (slocate) is a powerful indexing utility to query whom you can use locate keyword command within a shell, hereafter a note about making it more sensitive to users privacy through editing /etc/updatedb.conf file and PRUNEPATHS= vairable.

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1) make the mount point folder
e.g. sudo mkdir /media/iso
2) issue mount command
sudo mount -t iso9660 -o loop isofile.iso /media/iso
you can mount this way also .img files

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Many thanks fly to Christophe Grenier http://www.cgsecurity.org/ for having developed such good and useful OpenSource tools for linux licensed under the GNU Public License (GPL).
I’m talking about TestDisk and PhotoRec

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