include("config.php");
mysql_connect("$dbhost", "$dbuname", "$dbpass");
mysql_select_db("$dbname");
echo mysql_error();
phpinfo();
?>
--
script to test php.info
<?php
include("config.php");
mysql_connect("$dbhost", "$dbuname", "$dbpass");
mysql_select_db("$dbname");
echo mysql_error();
phpinfo();
?>
include("config.php");
mysql_connect("$dbhost", "$dbuname", "$dbpass");
mysql_select_db("$dbname");
echo mysql_error();
phpinfo();
?>
shell scripting tip
suppose you want to write a script to install postfix-mysql package ( example ) and youdonot want intruption while the scripts executes you add the -y switch to the apt-get command.
#!/bin/sh
echo "this is a script tp install postfix fro virtual domains "
apt-get install -y postfix-mysql
or you can also try
#!/bin/sh echo "this is a script tp install postfix fro virtual domains " #apt-get install -y postfix-mysqlapt-get install postfix-mysql <<>
y
END
if you wan to install many packages ( put in loop )
#!/bin/sh
echo "this is a script tp install postfix fro virtual domains "
for package in package1 package2 package3
do apt-get install $package <<>
y
END
done
hope this helps you!!!!
Installing a DNS server on debian etch
apt-get install bind9
vi /etc/bind/named.conf.local
add the following
vi /etc/bind/test-server.db
add the following
$TTL 86400
$ORIGIN test-server.com.
@ IN SOA ns1.test-server.com. admin.test-server.com. (
2004042601 ; serial
21600 ; refresh
3600 ; retry
604800 ; expires
86400 ) ; minimum
IN NS ns1.test-server.com.
IN MX 10 mail.test-server.com.
IN A 192.168.0.242
ns1 IN A 192.168.0.242
www IN A 192.168.0.247
ftp IN A 192.168.0.247
mail IN A 192.168.0.244
aggi IN A 192.168.0.247
vi /etc/resolv.conf
nameserver 127.0.0.1
/etc/init.d/bind reload
on other clients
vi /etc/resolv.conf
nameserver 192.168.0.242
now do a
dig MX test-server.com
--
manipulating commands using keyboard maps
The inputrc file handles keyboard mapping for specific situations. This file is the startup file used by Readline — the input-related library — used by Bash and most other shells.
suppose you want to run a command witha specific keystroke eg : ctl+e to give the out put ls -la
you will need to append the following to the /etc/inputrc file
Control-e: "ls -la\n"
save the file
bind -f /etc/inputrc ------------> to the the changes may be relflected
now try to do a control +e and theout put on the screen will be a ls -la
now try to do a control +e and theout put on the screen will be a ls -la
--
Making Your Prompt More Informative
Setting a particular parameter is as simple as typing VARIABLE=value . This would set a parameter by the name VARIABLE with the value that you provide.
To see a list of the environment variables that are already set on your machine, type the following
$ env
Many prompts do not include the return code of the last command. Although such information is not completely necessary, it might help you see whether a previous command succeeded or failed. So, a simple, informative prompt that is easy to read can be set as follows (in the bash shell):
export PS1="-$?-(\u@\h) \w --> "
$? : this willgive you the return code wheather the previous command executed successfully
\w: This special sequence expands to your full current working directory. \n : can add this to the PS1 vairable ..... this takes you to the next line .
[ note: the export command sets a enviroment virable ]
you can also check inthe home dir of root ( ~ ) .bashrc file and make changes to the PS1 vairables there
--steps to create password-less login
On the host machines create a private and a public key pair
ssh-keygen -t rsa 2048
[this will create a ~/.ssh/id_rsa and ~/.ssh/id_rsa.pub for the private and public keys, respectively ]
now copy the ~/.ssh/id_rsa.pub to the remoate system where you want passwordless login
scp ~/.ssh/id_rsa.pub root@192.168.0.247:/tmp
Now on the remote machine
mkdir ~/.ssh
chmod 700 ~/.ssh
cp /tmp/id_rsa.pub ~/.ssh/authorized_keys
chmod 600 ~/.ssh/authorized_keys
now on the host machine try to login iin , it shold log you in woith outh a password
You can append as many public keys usig the >> sign
You can append as many public keys usig the >> sign
--
ssh for system admainistrators
ssh root@ipaddress command ---------> will display the command to you of the remote pC
secured copy
scp local_file root@192.168.0.244:/tmp/remote_file ----> copies the file ( local_file) to remote location
scp root@192.168.0.244:/tmp/remote_file loca_files ---> copies remote files to local machine
scp root@192.168.0.234:file1 name root@192.168.0.244: ----- will copy file1 frm the home dir of 192.168.0.234 to the home dir of 192.168.0.244
--
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