Many comments in http://blog.erben.sk/2014/02/06/country-cidr-ip-ranges/ was about IPv6 support.
Country IPv6 ranges
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Category Archives: linux
Xbox One Digital TV Tuner for Czech DVB-T2
My previous post was about WinTVDual-HD working well for Czech DVB-T2. I also own Xbox One Digital TV tuner. Does it work for Czech DVB-T2 when there are warnings about problems with German DVB-T2?
Reliable USB DVB-T2 adapter for Linux
For my tvheadend setup I was searching replacement for my dual multi-standard DVB TBS 5281 adapter, which is not working in recent kernels (>4.17) due TBS obsolete drivers. It is sad, because I was very satisfied with that hardware.
Reset USB device in linux
I had old UPS with serial port which was connected using Profilic USB to serial adapter. Sometimes this USB dongle had frozen and need to be restated – re-attached. This can be done in linux using IOCTL.
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Webmin behind haproxy
After recent security updates, my webmin (now 1.903) served trough haproxy stopped working. Login page was not loading correctly… Continue reading
Using mod_geoip in .htaccess
There has been some comments in my old posts trying to use generated country lists in Apache .htaccess. This approach is wrong, and I will show you much better way how to block or allow specific country.
Protecting WordPress with mod-security
This my blog and also other hosted websites running WordPress are target of bots trying passwords to wordpress admin and posting spam comments. I was unable to found simple plugin for comments dns blacklist, so I focused to mod-security. Continue reading
Big XFS filesystem NFS export mount fails with stale nfs handle
If you have big XFS filesystem (with lot of files) and you use inode64 mount option, exporting this file system using NFS may fail when mouting this export on client:
Stale NFS file handle
This error is strange and confusing. Workaround is to specify fsid in /etc/exports for this filesystem.
For more information check this nice blog article https://hpc.uni.lu/blog/2014/xfs-and-inode64/
Snapshoting virtual machine running mysql database
Backup in virtualized enviroment is mostly based on snapshoting entire virtual machine and saving this state to backup repository. This snapshot does not include memory of virtual machine. When you restore virtual machine from this snapshot filesystem is in unclean state, but journal filesystem can handle this. From mysql point of view server crash happended and database can be corrupted and unrecoverable, depending on what queries where running during snapshot. This unpredicted and unconsistent state you don’t want to have as a backup of your data. Continue reading
VMware backup script
I have been searching for simple and easy script to backup selected virtual machines running on esxi server, which will:
- run on linux – do not require windows machine; can’t use PowerCLI
- do not require direct access to esxi host using ssh (as other backups scripts like ghettoVCB.sh do) and will use API
- support multiple esxi hosts managed by vcenter
- have clear code – that means no perl hell (including big vsphere perl sdk)
- have short code
- can be put into cron
I was unable to find any to comply my requirements. I’m learning python, so I searched for some python vsphere libs and found psphere. Then backup.py has born.