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December 8, 2017

delete large directory containing thousands of files

Filed under: Linux — Tags: , , , , , — admin @ 11:22 am

Well if you try to remove a directory with multiple files rm will take a long time also some load on that server .

One solution is to rsync a empty directory .

mkdir empty_dir
rsync -a –delete empty_dir/ yourdirectory/

Also a perl can be made but the rsync is easy for me to remeber .

Some more information about this you can find here


November 2, 2017

Modify .htaccess on wordpress site to move to new domain

Filed under: Linux — Tags: , , , — admin @ 10:25 am

In order to move the wordpress to new domain you must modify the .htaccess with


#Options +FollowSymLinks
RewriteEngine on
RewriteRule ^(.*)$$1 [R=301,L]

August 30, 2017

httpd with multiple ssl and password for every key automatically

Filed under: Linux — Tags: , , , , — admin @ 1:19 pm

Well to use this we must use the SSLPassPhraseDialog functionality of httpd Рapache .

Basically into ssl.conf we put this line or modify the existing one into

SSLPassPhraseDialog exec:/path/script

Where script is read/execute only by root.

And the script is


$server = $ARGV[0];
#print $server;
if ($server eq ‘’ || $server eq ‘’ ) {
print ‘password one’;
} elsif ($server eq ‘’) {
print ‘Password two’;


July 5, 2017

Adding trusted root certificates to the server

Filed under: Linux — admin @ 2:11 pm

Linux (Ubuntu, Debian)

Function Method
Copy your CA to dir /usr/local/share/ca-certificates/
Use command: sudo cp foo.crt /usr/local/share/ca-certificates/foo.crt
Update the CA store: sudo update-ca-certificates
Remove your CA.
Update the CA store: sudo update-ca-certificates –fresh


Linux (CentOs 6)

Function Method
Install the ca-certificates package: yum install ca-certificates
Enable the dynamic CA configuration feature: update-ca-trust force-enable
Add it as a new file to /etc/pki/ca-trust/source/anchors/: cp foo.crt /etc/pki/ca-trust/source/anchors/
Use command: update-ca-trust extract


Linux (Centos 5)

Append your trusted certificate to file /etc/pki/tls/certs/ca-bundle.crt
cat foo.crt >>/etc/pki/tls/certs/ca-bundle.crt

June 27, 2017

change root password for mysql 5.7 fresh installed

Filed under: Linux — Tags: , , — admin @ 11:35 am

In order to find out actual password you need to grep log file

grep password /var/log/mysqld.log

This will provide you with root password .

After login on your mysql server with

mysql -u root -p

Then you must change root password with

ALTER USER ‘root’@’localhost’ IDENTIFIED BY ‘newpassword’;


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