Linux Command

Linux Command

Linux Prectical How To

PY

Contents

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1. Linux Command
   
2. Firewall
   
3. environment variable
   
4. customise firewall while install RedHat Linux
   
5. Install Web Application on RedHat Linux
   
6. 1. Install Apache Web Server
   
7. 2. install JAVA 2
   
8. 3. install tomcat
   
9. 4.install MySQL
   
10. About security of redhat linux
    
11. turn on ftp server (for ever)
    
12. linux command
    
13. create WAR file for bustops
    
14. Network Config
    
15. Add a user
    

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linux command

1. setup the computer: prompt>setup
   
2. config network interface: prompt>network config
   
3. ?? chkconfig ipchains off ??
   
4. service ipchains status
   
5. service ipchains start
   
6. service ipchains stop
   
7. service ipchains restart
   
8. about net work configure
   
9. lsmod
   
10. cd /etc/sysconfig/network-scripts
    
11. ls
    
12. pico ifcfg-eth0
    
13. service network restart
    
14. ifconfig
    
15. lokkit
    
16. service ipchains restart
    

Firewall

check firewall: service ipchains status


turn off firewall: service ipchains stops


turn off firewall from computer boot: chkconfig ipchains off

environment variable


The local environment variable is the "local" variable, it's available only for the particular instance of the shell.


The global environment variable is the shell variable which stays available ("inherited") for any program started from the current shell, including an another shell.


To set the local environment variable:


set variable_name=value (C shell)



variable_name=value (Korn or Bourne shell)



To unset the local environment variable:


unset variable_name (all shells)



To set the global environment variable:


setenv VARIABLE_NAME value (C shell)


VARIABLE_NAME=value; export VARIABLE_NAME (Korn or Bourne shell)



To unset the global environment variable:


unsetenv VARIABLE_NAME value (C shell)


unset VARIABLE_NAME (Korn or Bourne shell)



To list all environmnet variables:


env


To check a single environment variable:


echo $VARIABLE_NAME










customise firewall while install RedHat Linux



1.install


2.lokkit [enter]---customise


3.netconfig[enter]?


4.rhn_rgister[enter]


5.up2date










Install Web Application on RedHat Linux





1. Install Apache Web Server




cd /usr/local

cp /mnt/cdrom/apache_1.3.24.tar.gz ./

tar -zxf apache_1.3.24.tar.gz

mkdir apache

cd apache

cp -rf /usr/local/apache_1.3.24/* ./

cd ..

rm -rf apache_1.3.24

cd apache

./config

make

make install

/usr/local/apache/bin/apachectl start



stop apache


/usr/local/apache/bin/apachectl stop


restart apache


/usr/local/apache/bin/apachectl restart






2. install JAVA 2




RedHat Application CD

cd IBM

rpm -ivh IBMJava2-SDK-1.3-9.0.i386.rpm


cd /root

vi .bash_profile


add follow two lines:


JAVA_HOME=/opt/IBMJava2-13; export JAVA_HOME

PATH=$PATH:/opt/IBMJava2-13; export PATH


set PATH and JAVA_HOME for tomcat





3. install tomcat



tomcat 3.3.2



cd /usr/local

cp -rf /mnt/cdrom/jakarta-tomcat-3.3.2-dev.tar.gz ./

tar -zxf jakarta-tomcat-3.3.2-dev.tar.gz

mkdir tomcat

cd tomcat

cp -rf /usr/local/jakarta-3.3.2-dev/* ./

cd ..

rm -rf /usr/local/jakarta-tomcat-3.3.2-dev

cd tomca

cd bin

chmod 755 startup

chmod 755 tomcat

chmod 755 shutdown


./startup to start tomcat

./shutdown to stop tomcat



to open port 8080


prompt> ipchains -I input -j ACCEPT -p tcp -s 64.119.96.78 -d 64.119.96.77 8080

this command will not work

you must do:


prompt> setup


select firewall or prompt> lokkit[enter]

go to customize, on the line of "Other ports" put "webcache:tcp"

then type:

prompt> service ipchains restart




4.install MySQL



rpm -ivf /mnt/cdrom/MySQL-3.22.32-1.i386.rpm

rpm -ivf /mnt/cdrom/MySQL-client-3.22.32-1.i386.rpm


add password to root user:


/usr/bin/mysqladmin -u root password 'susan';



let 64.119.96.78 access MySQL on linux server as MySQL client


prompt> ipchains -I input -j ACCEPT -p tcp -s 64.119.96.78 -d 64.119.96.77 3306



3306 mysql's default tcp port number




About security of redhat linux





1. install



2. lokkit

3. netconfig[enter]?

4. rhn_register

5. up2date




?????????????????????????
after change the security rules:

ipchain restart
?????????????????????????



turn on ftp server (for ever)

1. prompt>chkconfig wu-ftpd on
   
2. check : prompt>ftp localhost
   

create WAR file for bustops




JAR -cvf ../deploy/emstops0.war *.*


Network Config

• list all exist network interface: ifconfig
  
• change IP: ifconfig eth0 664.119.96.78
  
• assign nstmask: ifconfig eth0 netmask 255.255.255.248
  
• stop network interface: ifconfig eth0 down
  
• start network interface: ifconfig eth0 up
  
• add default gateway: route add default gw 64.119.96.73
  

Add a User

• add user on Linux Server: take nina as a example
  
• add nina to www group password: ninatang
  
• useradd -g www nina
  
• vi ninapas
  
• nina:ninatang
  
• chpasswd < ninapas
  
• change group the user belong to: usermod -g newgroup nina
  
  

latest update : July 22, 2002