Linux Commands Raspbian

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whoami

The whoami command will display the current user account name of the logged in user.

echo

the echo command can be used to display information on output . Output can be set to the command line, stdout, stdin, or pip to another command

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pwd

The pwd will display the present working directory, which is the relative path of the directory where commands will be run.

cd

change directory command is used to change the directory location.

su

Switch user command to switch between user accounts
using the – (minus) is used to change to the root user. The password prompt will appear when switching into another user account.

exit

The exit command will will logout of the current user. If su was used will return to the user that was previously logged in until no user at which time it will log out of linux.

hostname

the hostname command will retrieve the hostname in raspian, which by default is [raspberrypi].

this can be changed by typing the desired name after hostname command.

hostnamectl

echo NodePiZero > hostname

cat /etc/hostname

Close terminal window and open and the new hostname should appear

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To add the hostname to other computers the name will need to be added to the hostfile or if available DNS.

Hosts

The hosts file can be found

X-Server

To get the Version:
Xorg – version

GNOME

GNOME 3 version is stored in this file:
/usr/share/gnome/gnome-version.xml

Package Installation

Compiling Software From Source

Tarball

To uncompress file use the tar command

tar -xzvf filename.tar.gz -C /[Directory/Path]

The file may include a setup script file, Look for /[Directory/Path]/bin/somescript.sh
The file should include any steps required for setup such as making directories and compiling any uncompressed code to binaries .
Example: Installing Jira on Raspian.

Repositories

apt-get

apt-cache

Server/Configuration Management

-Puppet
-Chef

Files

touch

the touch command can be used to create files

mkdir

make directory command will create a new directory, either relative to pwd or in declared absolute path.

ls

List command will display a list of files and directories. The command can list relative or absolute directory information.

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it can display as a list matrix or column directory information.

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chmod

change modes command allows modification of how files and directories are accessed.

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chown

change owner command allows the user that owns a file to be changed.
chown new_user_owner file_name

chgrp

change group command allows the group that owns a file to be changed.
chgrp new_group_name_assigned file_name

useradd

add new user command can be used to add new users

groupadd

Add new group command used to add new groups

setfacl

setfacl -m u:susie:rw file3

getfacl

umask

used to determine default permissions when not exclusively declared when creating files or directories.
default is 022 , this is subtracted from 666 to get permission settings.
can be changed