Archive for 'General' Category

Disable monitor blanking on Debian with LXDE for remote access using NoMachine and VNC

By technese - Last updated: Sunday, November 11, 2018

Edit file: /etc/xdg/lxsession/LXDE/autostart Remove: @xscreensaver -no-splash Append: @xset s noblank @xset s off @xset -dpms Sources: https://raspberrypi.stackexchange.com/questions/752/how-do-i-prevent-the-screen-from-going-blank

Patch vSphere 5.5 Updates

By technese - Last updated: Saturday, September 22, 2018

https://kb.vmware.com/s/article/2008939 (OLD: http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=2008939) http://www.v-front.de/2014/09/vmware-releases-vsphere-55-update-2.html

Search for string in file system in Linux

By technese - Last updated: Thursday, October 22, 2015

Search for the string ‘root’ in the entire filesystem # grep -H -R root ./* | cut -d: -f1 Source: http://www.cyberciti.biz/faq/howto-search-find-file-for-text-string

Shrink qemu qcow2 files

By technese - Last updated: Thursday, October 22, 2015

Excerpt from source: Windows Guest 1.Delete all unnecessary files, empty recycle bin 2.Defragment drive (you might need to do this several times, until you see it “compacted” well) 3.Use sdelete to zero free disk space. Please note that this operation will cause that all drive free space will be filled by zero, so the virtual […]

Find large files in Linux

By technese - Last updated: Thursday, October 22, 2015

Find files larger than 50 megabytes $ find . -type f -size +50000k -exec ls -lh {} \; | awk ‘{ print $9 “: ” $5 }’ Reference: http://www.cyberciti.biz/faq/find-large-files-linux

Best compression using tar and 7z

By technese - Last updated: Sunday, September 7, 2014

Compress using tar and 7z $ tar cf – <source folder/file> | 7z a -si <Destination archive>.tar.7z $ 7z x -so yourfile.tar.7z | tar xf – -C target_dir Reference: 1. http://askubuntu.com/questions/300097/how-do-i-create-tar-7z-file-from-the-command-line 2. http://askubuntu.com/questions/341628/how-to-extract-tar-7z-files-from-command-line  

Converting OVA to QCOW2 for use with QEMU/KVM

By technese - Last updated: Sunday, September 7, 2014

Extract the .ova file $ tar -xvf file.ova Convert the .vmdk to .qcow2 $ qemu-img convert -O qcow2 file.vmdk file.qcow2 Reference: http://edoceo.com/notabene/ova-to-vmdk-to-qcow2  

Block Inbound for Ports 135, 445, 1028 and Ping (ICMP 8) for Windows 7, 2008 Server

By technese - Last updated: Monday, April 1, 2013

For workstations/servers that are public Internet facing and do not have a  hardware/software firewall solution, use Windows Firewall with Advanced Security and block port 135, 445, 1028 and PING (ICMP 8) .  GRC’s Shields Up! shows these ports as being open. Reference: https://www.grc.com/x/ne.dll?bh0bkyd2 http://www.rackspace.com/knowledge_center/article/creating-an-inbound-port-deny-rule-for-windows-firewall-windows-2008  

Check Linux with rootkithunter and chkrootkit

By technese - Last updated: Sunday, November 4, 2012

Debian Linux # aptitude install chkrootkit rkhunter CentOS 6.x # yum install chkrootkit rkhunter

Import Active Directory Domain Services Cmdlets

By technese - Last updated: Monday, October 29, 2012

Open Powershell Prompt PS C:\> Import-Module active* PS C:\> Get-Command -Module active* Reference: http://blogs.technet.com/b/heyscriptingguy/archive/2010/01/25/hey-scripting-guy-january-25-2010.aspx