phpmyadmin root cannot login

mysql> USE mysql;
mysql> UPDATE user SET plugin='mysql_native_password' WHERE User='root';
mysql> FLUSH PRIVILEGES;
mysql> exit;

$ service mysql restart

Virtualizor: Windows Server 2016 / Windows 10: system thread exception not handled

Change CPU MODE from Default to Host Model in VPS settings

Custom php.ini for user cloudlinux

su -s /bin/bash USERNAME
cd /etc/cl.php.d/alt-phpXX/ (where XX depend from version)
vi custom.ini >> and add custom parameters.
disable_functions=function1,function2,mail

Zabbix: monitor disk space usage in OpenVZ container

Administration > General > Regular expressions

add

simfs

to File systems for discovery list

fio disk benchmark

fio --name=rand-write --ioengine=libaio --iodepth=32 --rw=randwrite --invalidate=1 --bsrange=4k:4k,4k:4k --size=512m --runtime=120 --time_based --do_verify=1 --direct=1 --group_reporting --numjobs=1

Nginx: zwracanie 444 przy próbie odwołania do nieistniejących hostów

server {
  server_name _;
  listen 80 default_server;
  return 444;
}

server {
  server_name _;
  listen 443 default_server;
  return 444;
}

find: znajdź i przenieś

find . -name "*.bak" -print0 | xargs -0 -I {} mv {} ~/old.files

MegaRAID smartd

megacli -pdlist -a0| grep 'Device Id'

Device Id: 0
Device Id: 1

smartctl -d sat+megaraid,1 -a /dev/sda

smartd.conf

/dev/sda -d megaraid,00 -H -W 1 -m MAIL -M exec /usr/share/smartmontools/smartd-runner
/dev/sda -d megaraid,01 -H -W 1 -m MAIL -M exec /usr/share/smartmontools/smartd-runner

CentOS: Error: rpmdb open failed

rm -f /var/lib/rpm/__db*
db_verify /var/lib/rpm/Packages
rpm --rebuilddb
yum clean all

Ubuntu: GRUB Error 17 / OVH

root (hd0,0)
setup (hd0)
kernel /boot/vmlinuz-XXXX root=/dev/vda1
initrd /boot/initrd.img-XXX
boot