I had recently lost my domain codemarvels.com; the warning emails from my domain provider was reaching a currently unused inbox, and thus had to spawn up the same website on codemarvels.in (the one that you are currently on).
The only command that worked for me on my EasyEngine deployment (for my ssl enabled website) was:
#upgrade to ee4 with this command
wget -qO ee https://rt.cx/ee4 && sudo bash ee
#clone existing website to new one.
ee site clone codemarvels.com codemarvels.in --ssl=le
If your new domain is mapped to this server, it should be ready for serving.
Glad to write about a twitter bot I had written and launched during the last Independence day – Tat Kim. For those who are not in the know, Tat Kim means “What’s that?” in Sanskrit – a very apt name for a Bot and allied service which answers questions of Sanskrit enthusiasts.
What does the Tat Kim Bot do?
Currently Tat Kim bot can be used to read Sanskrit tweets in your own script (Eg, Malayalam or Kannada) – there by taking away the need to know how to read Hindi (or Devanagari) to be able to consume these tweets.
Why?
Sanskrit is a pan-Indian language and it should be free from the constraints of a regional Lipi like Devanagari. Also, it helps to remember that some of the seminal works in Sanskrit were recorded not in Devanagari, but in Grantha Lipi (more or less Malayalam of our times)
Usage
If you happen to find a Sanskrit tweet from your favourite Sanskrit tweeple, comment on that tweet in the below format
@TatKimBot {languageCode}
Where language could be one from:
en, hi, bn, gu, kn, ml, or, pa, te, ta, mr
Details of Language codes:
Code
script
en
English
hi
Devanagari (Kept to support translations to Hindi at a later point of time)
bn
Bengali
gu
Gujarati
kn
Kannada
ml
Malayalam
or
Oriya
pa
Punjabi
te
Telugu
ta
Tamizh (The transliterations will be lossful due to Tamil script not being elaborate enough to represent all sounds of Sanskrit)
mr
Marathi (Kept to support translations to Marathi at a later point of time)
Example:
@TatKimBot ml And the bot responds in 15 seconds as in the below screenshot:
Archives of the transliterations
The archives of the transliterations done by Tat Kim Bot will be available at the web portal https://tat.kim
(A sample screenshot below)
Look forward to people finding and using it during the next few months!
#ssh into source server and do these
mkdir ~/cassandra-bkup
sudo cp /etc/medusa/medusa-example.ini /etc/medusa/medusa.ini
sudo vi /etc/medusa/medusa.ini
# Search for, and set these values in the ini file
storage_provider = local
base_path = /home/{username}/cassandra-bkup
# Save and Exit
medusa backup --backup-name=dev-db-data --mode=full
#compress output folder
tar -czf dev-db-bkup-tar ~/cassandra-bkup
# SCP the backup directory to destination server
scp -r -i <key-file> dev-deb-bkup-tar {dest-user}@{dest-server}:~/
Import data in Target DB
# ssh into target serer and do these
tar -xzf dev-deb-bkup-tar
ls ls /home/{username}/cassandra-bkup/cassandra_backups/
#note down the folder name parallel to the folder index, let it be {sourceHostLocalName}
sudo /etc/hosts
#add an entry with local nodes IP and host name as {sourceHostLocalName}.
#You can remove this later
# save /etc/hosts and Exit Vim.
sudo medusa restore-node --keyspace={keyspace of intereset} --backup-name=dev-db-data
Verify Imported data
cqlsh {targetNodeIp}
desc keyspaces #verify you have the source keyspace created
use {keyspaceOfInterest}
desc tables; #verify all your tables in the source are recreated here.
That’s it. You should now be able to work with your new Cassandra node!
In case a faulty script started by .bashrc or .profile is failing and crashing SSH initiation, you could still login and fix the issue by running shell directly via ssh.
Here is a weekend hack I wrote to remind me to get up from my workstation and do some lightweight exercises during the WFH days – Fit@WFH
Some of the features are –
Purely in browser side JS (your data stays at your computer)
Reminds you to workout during the tail end of every hour
Reminder both in Voice and Browser Notification
You can select the exercises you are comfortable with from a list
Built for desktop (i.e, for serious WFH’ers )
I guess someone else might also find tremendous value from it. So if you too are caught in a sedentary lifestyle and want to move more, go ahead – book mark and use it !
Problem: Changing just the datacenter name in cassandra-rackdc.properties gives the error:
Cannot start node if snitch's data center [newName] differs from previous data center [oldName]. Please fix the snitch configuration, decommission and rebootstrap this node or use the flag -Dcassandra.ignore_dc=true.
Solution: If you are just beginning to setup you cassandra cluster, and is ok to reset the data to bootstrapped state, do this
sudo service cassandra stop
sudo rm -R /var/lib/cassandra
sudo mkdir /var/lib/cassandra
sudo chown cassandra /var/lib/cassandra
sudo service cassandra start
If you need to persist the existing data, do this
sudo vi /etc/cassandra/cassandra-env.sh
# edit the JVM_OPTS line to make it look like below
JVM_OPTS=\"$JVM_OPTS -Dcassandra.ignore_rack=true -Dcassandra.ignore_dc=true\"
sudo service cassandra restart
This should normally resolve the dc name correction in rack-dc properties file.
