Install Ruby and Rails on CentOS

Download Ruby from http://www.ruby-lang.org/en/downloads/

extract it :

tar xzvf ruby-1.9.2-p0.tar.gz

install dependacies using :

yum install zlib zlib-devel


Now Install Ruby:

    cd ruby-1.9.2-p0

    ./configure
    make install

Install Rails : 
gem install rails

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How to upgrade MySQL 5.* to 5.5 in CentOS & RedHat

For RedHat/CentOS 5


## Remi Dependency on CentOS 5 and Red Hat (RHEL) 5 ##
rpm -Uvh http://dl.fedoraproject.org/pub/epel/5/i386/epel-release-5-4.noarch.rpm

## CentOS 5 and Red Hat (RHEL) 5 ##
rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-5.rpm


For RedHat/CentOS 6

## Remi Dependency on CentOS 6 and Red Hat (RHEL) 6 ##
rpm -Uvh http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-7.noarch.rpm

## CentOS 6 and Red Hat (RHEL) 6 ##
rpm -Uvh http://rpms.famillecollet.com/enterprise/remi-release-6.rpm


Enable Repository
yum --enablerepo=remi,remi-test list mysql mysql-server

Install/Update
yum --enablerepo=remi,remi-test install mysql mysql-server

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Run Script at startup in Linux

Create a script which you want to run at your linux box start up

after creating a script open terminal and type

crontab -e

@reboot /path to /your /script

and save it.

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use yum over proxy

open yum.conf file in any text editor or in terminal using

vi /etc/yum.conf

Add below line to the file

proxy = http://proxy server ip or hostname:port/

if connecting using login and password use

proxy = http://username:password@proxy server ip or hostname:port/

save and close the file.

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Configure Samba Server

opent terminal & create simple linux user using,

adduser username


smbpasswd -a username

after creating the password for that user type below command to enable that samba user,

smbpasswd -e username

now, create the directory which you want to share

now open samba configuration file from /etc/samba/smb.conf

and add the lines as below :

[directory name]

             path = /path /to /directory
             writeable = yes
;            browseable = yes
             valid users = username
             create mask = 0755 or 755

save file and exit

after doing this change the owner of that directory and restart the service of samba.

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Install LAMP Server on CentOS

First check httpd service is running or not

           /etc/init.d/httpd status


if its running, its ok else need to start

          /etc/init.d/httpd start


after starting httpd(apache) need to install mysql server

          yum install mysql-server

Now you need to start mysql daemon
         
          /etc/init.d/mysqld start

Now, log in to the mysql using
         
          mysql -u root -p
by default mysql root user doesn't have any password, when it asks for password just press enter and you will be logged in to the database.

if you want to create a password for root user,

UPDATE mysql.user SET Password = PASSWORD('password') WHERE     User = 'username';

FLUSH PRIVILEGES;

after installing mysql-server you need to install php,
for installing php need to download some RPM files which contains additional YUM repository definitions.

 (1) wget http://rpms.famillecollet.com/enterprise/remi-release-5.rpm
 (2) wget http://dl.fedoraproject.org/pub/epel/5/x86_64/epel-release- 5-4.noarch.rpm

Now, open the file remi.repo
      vi /etc/yum.repos.d/remi.repo

find the enabled option and set it to 1 and save it.

Now run command

yum install php php-cli php-gd php-mysql php-mbstring  php-mysql

now you're  done.

restart the daemon of httpd and check the version of php.

/etc/init.d/httpd restart
php -v or php --version





 

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Enable Root User for FTP

To access FTP using root user just need to follow three simple steps and its done.

(1) go to /etc/vsftpd directory
(2) remove root from user_list file
(3) remove root from ftpuser file

now restart the service of ftp and its done.

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