Knowledge Base
OpenVZ
KVM/Libvirt
- How to online resize KVM disk
- How to online attach KVM disk
- Creating QCOW2 overlay on top of read-only device
Cluster
- Setting VPS IO limits
- Shared OCFS file system between VPSs?
- Rename a non-clustered LVM on cluster
- Create OCFS2 partition
- How to resolve clvmd pvmove deadlock
- Oprava rozpadleho DRBD
- Instalace a nastaveni clusteru
- Rescan SCST target on initiator
- LVM locking failed on volume resize
Linux
- Manually create md RAID on CentOS/Scientific Linux
- Resize md RAID 0 after underlying disk grew in size
- EnhanceIO settings
- Discard,Trim,Unmap
- Resize tmpfs online
- Create luks encrypted partition
- Fix MC line-drawing issues in Putty
- Creating a simple CA cert and signed server cert
- Localization of bad RAM DIMM
- edit PROMPT
- Setting sssd authentication
- Use of UVT LXR Cross Referencer
- Transform Scientfic Linux 6 to CentOS 6
- Instalace Let's Encrypt klienta
- How to build RPM using our system
- EnhanceIO settings
- PageCache tuning
- Centralni sprava certifikatu podepsanych Let's Encrypt autoritou
- cos7-server
- Enable Ext4 Lazy Initialization
- Presun instalace COS7 na jiny stroj
- Pridani vyjimky do Java security
- LDAP vymena certifikatu pres cmd
MySQL
- Query mass kill
- Replication consistency check
- Replication consistency check and repair
- Create mysql replication
- MariaDB 10 example my.cnf
- MariaDB 10 - GTID based replication
- MariaDB 10 - multiinstance
- MySQL - repair corrupted relay log
- Mysql - how to debug problem with ROW based logging
- MariaBackup - how to restore
MongoDB
PostgreSQL
DRBD
Hardware
- ipmitool set dedicated lan
- Kalibrace APC UPS pres APCfix
- Setup Supermicro serial console
- Setup HPA on SSD
- Howto update firmware on mellanox IB card
Mikrotik
- Mikrotik ipsec SPI mismatch with multiple subnets
- How to setup backup for MT
- Unifi controller DHCP option
SCST
- Online extension of iscsi target
- FC & iSCSI target operations
- RW & RO target for different IQN
- Single initiator to multiple security group
Switche
SSL Certificates Providers
Infiniband
Areca
- Areca RS/VS expansion by changing disks
- areca restart without restart server
- Re-activate failed disk
PHP
FreeBSD
Benchmarks
Nginx
Systemd
Backups/Restores
- Restore virus encrypted files on Samba from BackupPC
- BackupPC restore from command-line
- Attach drbd iscsi backup to array
Security
Brno Iprace
Elasticsearch
Unifi