Sed: remove block of text

Example code:

var gdjfgjfgj235f = 1; var d=document;var s=d.createElement('script'); s.type='text/javascript';
(...)
d.getElementsByTagName('head')[0].appendChild(s);
}

Sed:

sed -i ‘/^var gdjfgjfgj235f/,/^}/d’ $file

sed -i ‘/^d.getElementsByTagName(.*head.*appendChild/,/^}/d’ $file

cPanel: Failed at step NAMESPACE spawning /usr/bin/mysqld_pre_systemd: Cannot allocate memory

cPanel, mysql error, openvz container

Failed at step NAMESPACE spawning /usr/bin/mysqld_pre_systemd: Cannot allocate memory

error occurs when jailed Apache enabled

check /proc/mounts limits

BORG backup: restrict client commands on remote SSH

Add on backup server to .ssh/authorized_keys:

command="borg serve --restrict-to-path /home/USER/REPO.borg",no-pty,no-agent-forwarding,no-port-forwarding,no-X11-forwarding,no-user-rc ssh-rsa KEY

cPanel DNS cluster - force sync zones to cPanel Slave Only from command line

1. Enable DNS cluster
2. Add cPanel Slave Only to MASTER as 'Synchronize changes'
3. Run from command line on master:

/usr/local/cpanel/scripts/dnscluster syncall --full

Check how many zones listed on slave:

[12:07:15 SLAVE root@XXXXXX ~]cPs# /usr/local/cpanel/whostmgr/bin/dnsadmin --action GETZONELIST --localonly|wc -l
1300

Recreate /boot directory on Centos 7

chroot / rescue / whatever

mv /boot{,.old}
mkdir -p /boot
chmod 0555 /boot
yum reinstall kernel -y
grub2-install /dev/xxx
grub2-mkconfig /boot/grub2/grub.cfg
ln -s /boot/grub2/grub.cfg /etc/grub2.cfg

Magento: white screen, 404 errors

Magento: white screen, 404 errors

add to index.php

ini_set('error_reporting', E_ERROR);
register_shutdown_function("fatal_handler");
function fatal_handler() {
    $error = error_get_last();
    echo("<pre>");
    print_r($error);
}

via: https://stackoverflow.com/questions/4784117/magento-how-to-debug-blank-white-screen

Magento: high MySQL load at_is_active.value_id > 0

High MySQL load, queries like

SELECT `e`.*, IF(at_is_active.value_id > 0, at_is_active.value, at_is_active_default.value) AS `is_a

run:

php -f shell/indexer.php reindexall –all 

nginx + cloudflare ssl = redirect loop solution

server {
   listen         80;
   server_name    example.com

   if ($http_x_forwarded_proto = "http") {
     return 301 https://$server_name$request_uri;
   }

}

SSH key restrict login

no-port-forwarding,no-agent-forwarding,no-X11-forwarding,command="echo 'Please login as the user \"XYZ\" rather than the user \"root\".';echo;sleep 10" KEY

WHM login without root password

whmapi1 create_user_session user=root service=whostmgrd locale=en