Cacher is the code snippet organizer for pro developers

ctrl + D / exit - выйти из операционной системы
ctrl + C - выйти из текущего выполнения программы

pwd - текущая папка

ls - список всех файлов и директорий в текущей папке

cd - перемещение по папкам

less [file] - просмотр файла

clear - очистить всю коммандую строку

page up or b Scroll         - back one page
page down or space Scroll   - forward one page
Up arrow Scroll             - up one line
Down arrow Scroll           - down one line
G                           - Move to the end of the text file
1G                          - or g Move to the beginning of the text file
/characters                 - Search forward to the next occurrence of characters
n                           - Search for the next occurrence of the previous search
h                           - Display help screen
q                           - Quit less

-a        --all        List all files, even those with names that begin with a
period, which are normally not listed (that is, hidden).

-A      --almost-all   Like the -a option except it does not list . (current directory)
and .. (parent directory).

-d      --directory     Ordinarily, if a directory is specified, ls will list the
contents of the directory, not the directory itself. Use this
option in conjunction with the -l option to see details
about the directory rather than its contents.

-F     --classify       This option will append an indicator character to the
end of each listed name. For example, it will append a
forward slash (/) if the name is a directory.

-h    --human-readable  In long format listings, display file sizes in humanreadable
format rather than in bytes.

-l                      Display results in long format.

-r     --reverse        Display the results in reverse order. Normally, ls displays
its results in ascending alphabetical order.

-S                      Sort results by file size.

-t                      Sort by modification time.

sudo fdisk -l           - show all devices
mount /dev/sdb1 /mnt    - mount given device in certain directory
umount /dev/sdb1        - unmount given device

tar -czvf projects.tar.gz /root/projects/             - unpack archive to destination directory
tar xf community_images.tar.gz -C /home/emmys/Pictures/Community/

mkdir /dir
rm -rf dir/ - delete all files and dir recursive

export PATH=$PATH:/usr/lib/jvm/java-8-openjdk/bin     - add to Path

shutdown -r now