To change your password in Linux OS, type:
passwd
The root user can change the password of any user by running passwd command with user name as argument:
passwd nick
will change nicks password. Running passwd without arguments as superuser/root, changes the root password.
Linux command to create file name equal to current date / time :
example create folder:
mkdir FOLDERNAME_`date +%d-%m-%Y_%H-%M-%S`
example create file with ping result (one file / hour - command add all lines to the end of the file)
ping -i 0.5 -s ...
APC is a PHP accelerator extension that can be installed using PECL. PECL comes with the php-pear package, and must be installed
yum install php-pear
install APC dependencies so that PECL can build APC:
yum install php-devel httpd-devel
yum groupinstall 'Development Tools'
yum groupinstall 'Development ...
Determine how many files there are in the current folder/directory:
many ways ;)
1. list files and folders:
[root@server1]# du -a /folders/test | cut -d/ -f2 | sort | uniq -c | sort -nr
17616 data
2. list files and folders
[root@server1]# ls -Ra1 /folders/test|grep -v ...
if you use PhpMyAdmin without install mbstring php extension, you get the warning about this:
The mbstring PHP extension was not found and you seem to be using a multibyte charset. Without the mbstring extension phpMyAdmin is unable to split strings ...
The best method is using YUM:
[root@server1 /]# yum install php-mcrypt
after finish, restart apache/httpd
[root@server1 /]# sudo /etc/init.d/httpd restart
This is the most important and useful option you can use and change the optimization settings in 7-Zip on the command line:
-mx, 7-Zip compression switch:
-mx0 - Don't compress at all. ( Is called "copy mode." )
-mx1 - Very low compression. ...
To install yum fastest mirror plugin (yum-plugin-fastestmirror) you can use next command:
yum install yum-plugin-fastestmirror
or
yum install yum-fastestmirror
command result:
[root@server1 ~]# yum install yum-fastestmirror
Loaded plugins: refresh-packagekit
updates/metalink | 4.5 kB 00:00
updates | 4.4 kB 00:00
updates/primary_db | 3.5 MB 00:04
Setting up Install Process
Resolving Dependencies
--> Running ...
Using YUM linux command (Cent OS or Fedora Core Linux)
as root user:
# yum install php-gd
# /etc/init.d/httpd restart
Verify if php gd is loaded --> Type the following command:
# php -m | grep gd
Your site permalinks doesn't seem to work with pretty links ? ==> mod_rewrite doesn't work !
Solution: make sure mod_rewite.so loaded on your httpd.conf and AllowOverride must set to all !
LoadModule rewrite_module modules/mod_rewrite.so
Search in /etc/httpd/conf/httpd.conf
<Directory />
***********
AllowOverride None
***********
</Directory>
and change AllowOverride line :
<Directory ...
