by dev
1. Login to your server using existing root password.
2. After login you can change the root password with below command.
passwd root
That’s aLL!
by dev
How to disable dangerous php functions
PHP switcher :
echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /usr/local/php/php.d/disabled_function.ini
PHP-CGI selector :
echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php53/usr/php/php.d/disabled_function.ini echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php54/usr/php/php.d/disabled_function.ini echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php55/usr/php/php.d/disabled_function.ini echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php56/usr/php/php.d/disabled_function.ini echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php70/usr/php/php.d/disabled_function.ini echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php71/usr/php/php.d/disabled_function.ini echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php72/usr/php/php.d/disabled_function.ini echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php73/usr/php/php.d/disabled_function.ini echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php74/usr/php/php.d/disabled_function.ini echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php80/usr/php/php.d/disabled_function.ini
PHP_FPM Selector :
** Don’t forget to restart php-fpm after changes
echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php-fpm53/usr/php/php.d/disabled_function.ini && service php-fpm53 restart echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php-fpm54/usr/php/php.d/disabled_function.ini && service php-fpm54 restart echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php-fpm55/usr/php/php.d/disabled_function.ini && service php-fpm55 restart echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php-fpm56/usr/php/php.d/disabled_function.ini && service php-fpm56 restart echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php-fpm70/usr/php/php.d/disabled_function.ini && service php-fpm70 restart echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php-fpm71/usr/php/php.d/disabled_function.ini && service php-fpm71 restart echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php-fpm72/usr/php/php.d/disabled_function.ini && service php-fpm72 restart echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php-fpm73/usr/php/php.d/disabled_function.ini && service php-fpm73 restart echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php-fpm74/usr/php/php.d/disabled_function.ini && service php-fpm74 restart echo "disable_functions = exec, system, popen, proc_open, shell_exec, passthru, show_source" > /opt/alt/php-fpm80/usr/php/php.d/disabled_function.ini && service php-fpm80 restart
How to enable back the dangerous php functions
To enable it back, simply delete disabled_function.ini file for the PHP version you want and restart apache/php-fpm.
by dev
At first, check whether Principal Contact details were added in Journal. Then go for Step One.
Step One
Turn on SMTP in config.php
[email] ; Use SMTP for sending mail instead of mail() smtp = On ; SMTP server settings smtp_server = mail.example.com smtp_port = 25 ; Enable SMTP authentication ; Supported smtp_auth: ssl, tls (see PHPMailer SMTPSecure) smtp_auth = ssl smtp_username = username smtp_password = password ;
You contact hosting provider to get the SMTP details
NB: If the above setting does not work anyway, then go for adding envelop sender.
Step Two
Allow envelop sender
; Allow envelope sender to be specified ; (may not be possible with some server configurations) allow_envelope_sender = On ; Default envelope sender to use if none is specified elsewhere default_envelope_sender = my_address@my_host.com ; Force the default envelope sender (if present) ; This is useful if setting up a site-wide no-reply address ; The reply-to field will be set with the reply-to or from address. force_default_envelope_sender = On
Make sure to match the domain in your default_envelope_sender with the domain of OJS installation. If it doesn’t match this increases the spam rating.
by dev
Postfix Mail Queue Management
To view the number of emails in the Postfix mail queue
mailq
To delete all emails in the queue
postsuper -d ALL
To remove all mails in the deferred queue
postsuper -d ALL deferred
To remove a particular mail from the queue
postsuper -d mail_id
To remove messages from a particular domain.
mailq | grep xdomain.com | awk {'print $1'} | xargs -I{} postsuper -d {}
To remove all mails from a particular mail id
mailq | tail +2 | awk 'BEGIN { RS = "" } / testmail@xdomain\.com$/ { print $1 }' | tr -d '*!' | postsuper -d -
To remove all mails which have testmail@xdomain.com in the entire mail.
for id in `postqueue -p|grep '^[A-Z0-9]'|cut -f1 -d' '|sed 's/*//g'`; do postcat -q $id | grep testmail@domain.com && postsuper -d $id; done
To remove all mails which have a particular pattern like “.de”
for id in `postqueue -p|grep '^[A-Z0-9]'|cut -f1 -d' '|sed 's/*//g'`; do postcat -q $id | grep “.de” && postsuper -d $id; done
/var/spool/postfix/maildrop /var/spool/postfix/hold /var/spool/postfix/incoming /var/spool/postfix/active /var/spool/postfix/deferred /var/spool/postfix/corrupt
Display the list of Queued mails , deferred mails, and Pending mails
postqueue -p
To Display the mail header and contents
postcat -q “Queue ID”
To check the total number of mails in the queue
postqueue -p | grep -c "^[A-Z0-9]"
To attempt to send one particular mail
postqueue -i “Queue ID”
Force mails on Postfix
To reattempt delivery of all mails in the queue
postqueue -f
by dev
To reboot VPS 5 minutes after midnight everyday:
Login via SSH and run the following:
echo shutdown -r now > /root/shutdown.sh;chmod +x /root/shutdown.sh
Then run crontab -e and enter this line:
5 0 * * * /root/shutdown.sh
Then save and exit.