You probably encountered the following error if you are a fan of using the Juniper SSG/ScreenOS WebUI using a “modern” browser : ERR_SSL_VERSION_OR_CIPHER_MISMATCH Well, since the latest clustered SSL exploits, the vast majority of browsers decided to disable some protocols and ciphers for everyone’s safety. To work around this issue, you may use the following… Read More »
Windows evolved a lot in the last years, what was once a headache for system administrators is now behind us since a few years. Microsoft now allow to convert a installed Windows Server 2016 Standard to Datacenter without having to re-install. To achieve this, you will need to have in hand your Windows Server 2016… Read More »
I recently encountered the following message trying to copy a ISO file located on a datastore : Expected put message. Got: ERROR Unfortunately, this message isn’t telling us much. However by deduction, this error is caused by some lock on the file because already in use in some way. Make sure that no virtual machine… Read More »
I had the luck of experiencing the following blue screen on a Windows Server 2008 R2 domain controller server at boot lately : *** STOP: 0x0000007E (0xFFFFFFFFC0000005, 0xFFFFF880018C9836, 0xFFFFF880009A9008, 0xFFFFF880009A8860) Related facts with this server : – Haven’t been rebooted since two years – Windows Updates haven’t been run for two years – Running minimalistic… Read More »
Having the following error output trying to start, restart or do a configtest on Apache server? Invalid command ‘ProxyPreserveHost’, perhaps misspelled or defined by a module not included in the server configuration This is likely caused because mod_proxy module is not present or disabled. To enable it, look out for the following in the main… Read More »
uTorrent is a great BitTorrent client which have a free offer version. Like any free products, ads are involved at some point. Fortunately the developers left a function for users to turn them off. It is well hidden in the advanced features. Make sure before going forward with this procedure to not touch any other… Read More »
Slow MySQL server, with very high load and consuming a lot of I/O without any particular reason? If you see the following error when looking at the MySQL log file (/var/lib/mysql.log), then now you know why! [ERROR] /usr/libexec/mysqld: Table ‘./database_name/table_name’ is marked as crashed and should be repaired Fortunately, this issue is probably easy fixable… Read More »
Particularly useful when building appliances or when you ship pre-build systems to a remote location where technical knowledge of people at the remote site is limited, you can easily make the system “print” the IP acquired by DHCP or even the static assigned one to the system console login. You will need to create two… Read More »
There might be a few situations where you need more flexibility than what the clock UI can provide. In that case, you will need some help from the command line and registry. To manually synchronize the clock with a time server using the command line : net time \\<ntp_server> /set /yes NOTE : Replace <ntp_server> with… Read More »
Upgrading from vCenter 5.5 to 6.0? Then you might have run into the following issue during the setup : The range of ephemeral TCP ports on this system is 1025 to 65534. This range of ports is too large and the system must be reconfigured to use a smaller ephemeral port range before the install can… Read More »