6. Managing processes
I t can be determined that the commands be performed consecutively (one
after another, without the piping) by separating them with the semi-colon (;)
% l s;date
I f one wants to run more commands at the same time
VMware Player and creating a new virtual machine.
1. Download VMware Player from
VMwares website, and install it.
2. Download Ubuntu 10.04 iso-image
from Ubuntus website
3. Start VMware Player
4. Choose option: Create a New
5. You can choo
In Linux you can use both IDE and SCSI disks. On the linked web site you can
have information about the disk usage and disk partitioning.
df (more information)
The use of the disk space ca
Package managers in Ubuntu
What is a package manager?
A package manager is a program that installs and uninstalls software,
and keeps track of all the components each piece of software needs.
To add or remove applications in Ubuntu, you need to use a pa
T790106D Server Operating Systems 6 ECTS cr
The student understands the fundamentals of server administration.
Student is able to install server operating systems and can maintain
systems securely. Student knows typical networking servi
A t ext file containing UNIX shell commands is known as a script (or
S cripts are interpreted rather than compiled, which means that the
computer must translate them each time it runs them.
T hey are thus less efficient than p
User and group information
The kernel of Linux handles usernames (UID) and group names (GID) as
digital values instead of the names.
UID values under a hundred belong to the root (administrator) and
different kind of services.
Programs use UID values betw
INPUT/OUTPUT AND REDIRECTION
Standard input and standard output
Each Unix command (process) can read from standard input
- By default, the standard input is the keyboard.
When you issue a Unix command like date, the output of the command
goes to what is c
CONFIGURE THE ENVIRONMENT
P ressing CTRL + "a sign" means the control sign
E .g. CTRL-C interrupt the program (intr)
I t is marked often C with the hat, for example ^C
C ontrol signs can be chosen with the s tty c ommand
s tty a l ists the
Linux and another Unixes
Free multiprocessing operating system of many users
Linux is the GPLproduct (GNU Public Licence)
The license commonly used is the GNU Public License (GPL). The
license says that anybody who may want to
Paths and Directories
A ll the files are grouped together in the directory structure.
T he file-system is arranged in a hierarchical structure, like an inverted
T he top of the hierarchy is traditionally called root (written as a
2. Files and access rights
The information, which is stored from the files:
owner and group
date of creation
name and size
In your home directory, type
% ls -l (l for long listing!)
You will see that you now get lots of details a
Common Unix/Linux commands
The default action is to show the current folder as an
absolute path.All components of the