UNIX

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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

list directory contents
ls –lrt

list all the files in the current directory with permission, userid , user , size , date and time , File name
lpr

standard print command (see also print)
more

use to read files
mkdir

create directory
mv

for moving and renaming files
ncftp

The purpose of ncftp is to provide a powerful and flexible interface to the Internet standard File Transfer Protocol.
print

custom print command (see also lpr)
ps

Report process status. If no options are specified, you will see information about only those processes connected to your current terminal session.
ps –e

Shows information about all processes currently running on the system.
pwd

“Present Working Directory” used to 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
vi

vi is the standard Unix editor
wc

count characters, words, lines