unix commands

Here is a list of some UNIX command.

cat --- for creating and displaying short files
chmod --- change permissions
cd --- change directory
cp --- for copying files
date --- display date
echo --- echo argument
ftp --- connect to a remote machine to download or upload files
grep --- search file
head --- display first part of file
ls --- see what files you have
lpr --- standard print command (see also print )
more --- use to read files
mkdir --- create directory
mv --- for moving and renaming files
ncftp --- especially good for downloading files via anonymous ftp.
print --- custom print command (see also lpr )
pwd --- find out what directory you are in
rm --- remove a file
rmdir --- remove directory
rsh --- remote shell
setenv --- set an environment variable
sort --- sort file
tail --- display last part of file
tar --- create an archive, add or extract files
telnet --- log in to another machine
wc --- count characters, words, lines
source: www.utah.edu

Unix operating system

Unix is an operating system developed by AT & T employees at Bell labs. including Thomson, Ritchi etc in 1965. Also C language was developed by Ritchi in later years and C is well suited for UNIX.
main features of UNIX OS
1.multi user: more than one person can work at a time
2.multi tasking: number of works can be done at a time
3.networking facilities
Unix has two main layers those are shell and kernel. shell provides command user interface and that of kernel provides the access to the hardware.