IT Blog

D-Link DCS-910 Firmware Update

I will describe the steps you need to take to update the firmware of the D-Link DCS-910 camera:

Red SYSTEM LED on SW-SUP720-3BXL

Once on a Cisco Catalyst 6509-E, I noticed that the SYSTEM LED on the WS-SUP720-3BXL is lit red.

D-Link DGS-3100 firmware update

On the test, I will use the D-Link DGS-3100-24TG rev.A2 switch with firmware 3.60.44 and Boot PROM v.1.0.1.05.

TP-LINK TL-WR741ND V2 firmware upgrade from OpenWrt to factory

I updated the firmware once in the TP-LINK TL-WR741ND V2 router with OpenWrt | Kamikaze (r25068).
Standard root login without a password. The user has set some kind of password, so I had to hold the reset for 15 seconds while the router was turned on in order to reset the settings.

cPanel. Upgrade MySQL 5.5 to 5.7

For example, update the MySQL server from version 5.5 to 5.7.
Before performing an update, it is imperative that you make backup copies of all databases, including the standard ones.

Recovering MySQL InnoDB after power failure

Once, after the power was turned off, the UPS was discharged, then the generator automatic start did not work because it turned on and off several times, as a result, the server with MySQL was also started and disconnected from the power supply several times, later the tables of different databases were damaged , including the default database with mysql users, as a result, the MySQL daemon did not start.

Changing InnoDB log file size in MySQL

InnoDB log file size – the size of the transaction log files that are needed to cancel transactions and restore the database in case of failure.

Logrotate Bind9

Suppose Bind9 logs are written to the /var/log/named/ directory, have the .log extension and so that the disk space does not overflow with logs, configure logrotate.

“Lock the self-replacement of SIM” at Kyivstar

Usually, simple SIM cards of the Kyivstar mobile operator, bought in some kind of stall or store, can be replaced independently with a new SIM card, for example, you can buy another SIM card there and call the operator, say that the old card is lost, report the last few dialed and accepted numbers, then the operator will block the old SIM card and activate a new one but with the same number that was on the old one.

Configuring VLAN on Mimosa B5c

It took one time to configure several VLANs on the Mimosa B5c, the devices were already installed and the traffic passed through them without a tag in one VLAN.