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Category: Ubuntu
- How to clear cached RAM
sync; echo 3 > /proc/sys/vm/drop_caches; echo 0 > /proc/sys/vm/drop_caches; sync
- Using mod_proxy in Plesk to redirect to a different site
Scenario:
Site1 : www.site.com
Site2 : shop.site2.comThe idea is to make a proxy redirect so if I access www.site.com/shop to be redirected to shop.site2.com and keep the URL in the browser.
This can be done either by using mod_rewrite (if both sites are on the same server) or by using mod_proxy. In my case I had to do this on a Plesk server.I’ve created in /var/www/vhosts/site.com/conf a file called vhost.conf that contains:
ProxyRequests off
Order deny,allow
Allow from all
ProxyPass /shop http://shop.site2.com
ProxyPassReverse /shop http://shop.site2.com
SetEnv force-proxy-request-1.0 1
SetEnv proxy-nokeepalive 1
Order allow,deny
Allow from allThen I ran:
/usr/local/psa/admin/bin/websrvmng -a -vVerify httpd.include to see if there is any Include directive.
Now if you go to www.site.com/shop/ you should be redirected to shop.site2.com. Notice the trailing slash after (../shop/). That needs to be there otherwise it won’t load the images properly.
This can be fixed by adding in vhost.conf a Rewrite rule like:
RewriteEngine on
RewriteRule ^/shop$ /shop/ [R] - Install Dante socks proxy
Dante socks install :
Download Dante from : ftp://ftp.inet.no/pub/socks/dante-1.2.0.tar.gz
tar zxvf dante-1.2.0.tar.gz
cd dante-1.2.0
yum install gcc make
./configure
make -j4
make installifconfig -a | grep inet | awk ‘{print $2}’ | awk -F ‘:’ ‘{print $2}’ | grep -v 127.0.0.1 > /root/ips
for i in `cat ips` ;do echo “internal: $i port = 6060″ >> /root/sockd.conf ;done
Example of sockd.conf :
logoutput: stderr
method: username none
external: externalIPtouse
client pass {
from: 0.0.0.0/0 port 1-65535 to: 0.0.0.0/0
}
pass {
from: 0.0.0.0/0 to: 0.0.0.0/0
method: username
protocol: tcp udp
}Launch using :
sockd -f /root/sockd.conf -d
- How much disk space a database takes?
Login to mysql and run :
select SUM(data_length) + SUM(index_length) as size from information_schema.tables where table_schema = 'your_database'; - Move Windows with screen
- change to the window you want to move
- type (for example) ^a:number 1
- ^x is the host key (usually ^a on most machines) (CTRL+A)
- :number (typed literally) is the command
- 1 the number to move the current screen to
- Error compiling PHP on CentOS 64 bit
In order to compile PHP on 64 bit you need to use the option
--with-libdir=lib64otherwise you will stay forever with the following errorchecking for MySQL support... yes
checking for specified location of the MySQL UNIX socket... no
checking for MySQL UNIX socket location... no
checking for mysql_close in -lmysqlclient... no
checking for mysql_error in -lmysqlclient... no
configure: error: mysql configure failed. Please check config.log for more information.Other possible reasons are :
1. missing the libtool-ltdl-devel package
2. missing the ncurses-devel
3. missing mysql-devel package - /usr/bin/ld: cannot find -lltdl
yum install libtool-ltdl.x86_64 libtool-ltdl-devel.x86_64