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To install the GD run the following command from the SSH root
apt-get install php5-gd
Then restart the webserver by
/etc/init.d/nginx restart
and the PHP engine by
/etc/init.d/php-fastcgi restart
If you have installed phpMyAdmin in your linux server (centos/RHEL/debian), and tried to access phpMyAdmin in most cases you will get this 403 forbidden error. I have seen this issue very often if you are installing phpmyadmin using yum or by apt-get. By default phpmyadmin installed path is /usr/share/phpmyadmin and the apache configuration file is located in /etc/httpd/conf.d/phpmyadmin.conf.
Forbidden
You don't have permission to access /phpmyadmin/ on this server.
To fix:
nano /etc/httpd/conf.d/phpmyadmin.conf
Remove or comment the first two lines in bold.
#Order Allow,Deny
#Deny from all
Allow from 127.0.0.1
Restart the apache server.
service httpd restart
Once this is done, Point your browser to http://yourserveripaddress/phpmyadmin
Login the server SSH using root
Inorder to check if mysql is already installed or not run this command
which mysql
If found it will show some directory name otherwise not found
In order to remove old mysql
yum remove mysql-server
yum remove mysql
Now to install mysql run this command from the shell or a command line access point
yum install mysql-server
yum install mysql
yum install mysql-devel
Inorder to use with php
yum install php-mysql
service mysqld restart
By default mysql has the no passward. To change the password in command shell write the following commands
mysql
mysql> USE mysql;
mysql> UPDATE user SET Password=PASSWORD(‘new-password’) WHERE user=’root’;
mysql> FLUSH PRIVILEGES;
If the websites are managed with VirtualMin. Each site has its own user name, group and home folder.
For example, site www.sampleweb.com under VirtualMin has user name and groups sampleweb as well as home folder /home/sampleweb.
The document root of the site is /home/sampleweb/public_html.
If the Nagios is installed on the same server, it change the apache group and all the websites start returning
403 error permission denied.
To resolve this add the user group again to apache for example :
/usr/sbin/usermod -a -G sampleweb apache
retstart apache and you will be back in business
IMPORTANT : THE NAGIOS INSTALLATION IS NOT RECOMMEND ON HOSTING SERVERS, AND THIS SHOULD BE DONE ON A PLAIN INSTALLATION ONLY, OTHERWISE IT LEADS TO SEVERAL PROBLEMS LIKE ONE ABOVE.
To save the edits you have made, but leave vi running and your file open:
- Press <Esc>.
- Type :w
- Press <Return>.
To quit vi, and discard any changes your have made since last saving:
- Press <Esc>.
- Type :q!
- Press <Return>.
STARTING vi
vi filename edit a file named "filename"
vi newfile create a new file named "newfile"
ENTERING TEXT
i insert text left of cursor
a append text right of cursor
MOVING THE CURSOR
h left one space
j down one line
k up one line
l right one space
BASIC EDITING
x delete character
nx delete n characters
X delete character before cursor
dw delete word
ndw delete n words
dd delete line
ndd delete n lines
D delete characters from cursor to end of line
r replace character under cursor
cw replace a word
ncw replace n words
C change text from cursor to end of line
o insert blank line below cursor
(ready for insertion)
O insert blank line above cursor
(ready for insertion)
J join succeeding line to current cursor line
nJ join n succeeding lines to current cursor line
u undo last change
U restore current line
MOVING AROUND IN A FILE
w forward word by word
b backward word by word
$ to end of line
0 (zero) to beginning of line
H to top line of screen
M to middle line of screen
L to last line of screen
G to last line of file
1G to first line of file
<Control>f scroll forward one screen
<Control>b scroll backward one screen
<Control>d scroll down one-half screen
<Control>u scroll up one-half screen
n repeat last search in same direction
N repeat last search in opposite direction
CLOSING AND SAVING A FILE
ZZ save file and then quit
:w save file
:q! discard changes and quit file
