.htaccess redirect all pages to new domain —
RewriteEngine on
RewriteRule ^(.*)$ http://new.site/$1 [R=301,L]
Add swap on Debian 7 —
VPS:/# cd /var
VPS:/var# touch swap.img
VPS:/var# chmod 600 swap.img
VPS:/var# dd if=/dev/zero of=/var/swap.img bs=1024k count=1000
1000+0 records in
1000+0 records out
1048576000 bytes (1.0 GB) copied, 4.0868896 s, 253 MB/s
VPS:/var# mkswap /var/swap.img
Setting up swapspace version 1, size = 1020 GiB
no label, UUID=72761533-8xbe-436l-b07e-c0sabe9cedf3
VPS:/var# swapon /var/swap.img
VPS:/var# echo "/var/swap.img none swap sw 0 0" >> /etc/fstab
VPS:/var# sysctl -w vm.swappiness=30
How to extend disk \ partition on VMWare VM —
1. STOP VM on VMWare
2. EDIT and add disk space
3. Start VM
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Ubuntu 14.04 won’t load after upgrade or Upgrade WUBI Ubuntu from 12.04 to 14.04 —
I’ve just upgraded from 12.04 to 14.04 on my WUBI installation.
The upgrade told me to Restart to finish the upgrade!!!
But when I did it, I got a black screen with :
4 lines beginning “mount:mounting…” etc,
then “Target file-system doesn’t have requested /sbin/init”
Ok challenge accepted!
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Start/Stop/Reboot VMs on ESXi Host through SSH —
Check the current state of the VM:
vim-cmd vmsvc/getallvms
vim-cmd vmsvc/power.getstate
Turn it off and on, restart it etc:
vim-cmd vmsvc/power.on
vim-cmd vmsvc/power.off
vim-cmd vmsvc/power.restart
vim-cmd vmsvc/power.reboot
vim-cmd vmsvc/power.shutdown
No interfaces listed in Wireshark —
These commands work for me with Wireshark 1.6.2 on Ubuntu Server 11.10 (64-bit):
$ sudo apt-get install wireshark
$ sudo dpkg-reconfigure wireshark-common
$ sudo usermod -a -G wireshark $USER
$ sudo reboot
Tool to test bandwidth between 2 servers —
I found two cool programs : Iperf and NetCat
5 Tips To Speed Up Linux Software Raid Rebuilding And Re-syncing —
It is no secret that I am a pretty big fan of excellent Linux Software RAID. Creating, assembling and rebuilding small array is fine. But, things started to get nasty when you try to rebuild or re-sync large size array. You may get frustrated when you see it is going to take 22 hours to rebuild the array. You can always increase the speed of Linux Software RAID 0/1/5/6 reconstruction using the following five tips.
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Skip MySQL replication ERROR —
Type in mysql console :
STOP SLAVE; SET GLOBAL SQL_SLAVE_SKIP_COUNTER = 1; START SLAVE;
Or just add in my.cnf :
slave-skip-errors = 1062
Get UUID of Hard Disks —
The Universally Unique Identifier can be used to identify a device independent form its mount point or device name. This is more and more important as many devices today support hot-plugging or are external anyway. Therefore it makes sometimes sense to access a device (for example in fstab) not by device name but by the UUID.
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