On Ubuntu, if you set the time manually using
sudo locale-gen en_GB.UTF-8
then the problem is that it does not take BST (British Summer Time) into account, so during BST the server time is out by 1 hour. This is obviously an issue if you have time restrictions on logging on to whatever system is hosted on the server.
The solution is to run:
sudo dpkg-reconfigure tzdata
Follow through the on-screen prompts to set the locale to Europe and then London this then solves the issue, and the server automatically stays at the correct time when the clocks change.
Moving servers from one infrastructure to another. In our case, from Webfusion UK to AWS.
Problem we face is that there are over 82Gb of files to move from one server to another. Traditionally we would have downloaded them all locally, then uploaded them, but what if there was a way to transfer them directly from one server to another.
We turned on FTP on the source server, and updated the firewall so that only the destination IP could connect.
Then on the destination server we can simply type:
wget -r ftp://sourceip/folderinftproot/* –ftp-user=username –ftp-password=password -P /var/www/html/ -q
This copies all folders from the FTP root on the source server in to the web root of the new server.
To transfer 82Gb of data between data-centres took 14 minutes, compared to the older download-upload method we used to use that took several overnights of downloading locally!
And of course, remembering to turn off FTP on the source server once completed!
Ubuntu – count all files in a folder recursively.
Took a while to figure out how to do this on a single command, but so very useful to check if all files have copied successfully.
find . -type f | wc -l
How this works:
find . -type f finds all files ( -type f ) in this ( . ) directory and shows everything as one file on each line in a list.
The second command comes after the pipe | into
wc (word count) the
-l option tells wc to only count lines of its input.
Together they count all files in the folder you are in and all sub-folders.