CHAPTER 7 - STANDARD INPUT AND OUTPUT

CHAPTER 8 - PROCESSING

CHAPTER 9 - MORE ON THE SHELL

CHAPTER 10 - SHELL PROGRAMMING

CHAPTER 11 – FTP

CHAPTER 12 – CRONTAB

Linux Commands:

ls -a              List of files and directories
mkdir           make a directory
cddir            change to named directory
cd                change to home directory
cd ..             change to parent directory
pwd             present working directory
w     show who is logged on and what they are doing
cp file1 file2 -- copy file1 and call it file2
mv file1 file2-- move or rename file1 to file2
rm file         remove a file
rmdir           remove a directory
cat file        display a file
less file       display a file a page at a time
head file display the first few lines of a file
cat> filename -- create a file
And if we want to add more text
gedit filename
tail file           display the last few lines of the files
ls list*    list all files in the current directory starting with list
man               read the online manual page for a command
grep               it searches files for specified word or patterns
eg: grep word filename
whatis cat       gives a online description of the command
top                  display LINUX tasks
touch              change file timestamps
finger             user information lookup program
info                gives info
scp                Secure copy
who               list of user currently logged in
which            shows full path of (shell) commands
diff file1 file2 -- this command compares the content of 2 files and display the file
printenv --    to see a list of your environment

chmod(changing a file mode)
u- user, g-group, o-other, a -all
r-read 4, w-write   2, x-execute 1
user group other
rwx rwx     rwx
421 4 1       21
7       5          3
chmod 753 filename

Network commands
ifconfig   config a network interface
telnet      user interface to the telnet protocol
ftp           install file tranfer protocol

whoami   Display username
uname    Display O.S name
sort        To sort the contents of a file

date       To display the system date
%D   display the date in MM/DD/YY
%d    display the day of the Month
%m   display the month
%y    display the year
date "+%m"      output is 06

%a displays abbreviated weekdays
%A weekday
%b month
%B month

eg: date "+ current date:%A"
eg: $date"+%a"

eg: $ cal 10 2006

echo display a msg given on the monitor
eg: $echo welcome

id-- display the no. of userids and groupids
options -u the no. of users and -g the no. of groups
eg: $id ,$id -u   and $id -g

Linux

CHAPTER 1 - ABOUT UNIX

CHAPTER 2 -LOGGING IN AND OUT

CHAPTER 3 - THE UNIX FILESTORE

CHAPTER 5 - DOING MORE CHAPTER 6 - FILE PERMISSIONS

CHAPTER 5 - DOING MORE

CHAPTER 6 - FILE PERMISSIONS