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Wednesday, 16. October 2019
Weekly Email Notification

enable Weekly Email Notification from the Trusted Advisor.

1) Open the AWS Management Console.
2) Go to the Trusted Advisor service.
3) Select Preferences from the sub-navigation.
4) Enable weekly email notifications.

... Link (9 comments) ... Comment


Thursday, 3. October 2019
Change default head rows from 5 to 3

from functools import partialmethod
pd.DataFrame.head = partialmethod(pd.DataFrame.head, n=3)

... Link (4 comments) ... Comment


Friday, 20. September 2019
Install java within conda container

apt-get update && apt-get upgrade
mkdir -p /usr/share/man/man1
apt-get install default-jdk
apt install openjdk-11-jdk

... Link (5 comments) ... Comment


Tuesday, 10. September 2019
Use SNS topic to send marbot alarms by email
  1. Open the AWS SNS Management Console
  2. Create and select a SNS topic
  3. Click on Actions > Subscribe to Topic

  4. Choose HTTPS as the protocol and set the endpint to:
    api.marbot.io

  5. Configure your CloudWatch Alarms to send notifications to the SNS topic.

... Link (24 comments) ... Comment


Managing EBS volumes

lsblk prints all block devices in a tree-like format.

lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
xvda 202:0 0 8G 0 disk
└─xvda1 202:1 0 8G 0 part /
xvdf 202:80 0 90G 0 disk

If file command on the disk identifier "xvdf" shows simply "data", then there is no file system on the device and you need to create one.

file -s /dev/xvdf
/dev/xvdf: data

... Link (8 comments) ... Comment


Wednesday, 28. August 2019
download food 11 dataset

The total file size of the Food-5K dataset is about 1.16 GB. Here are steps to download food 11 dataset.

mmspg.epfl.ch

Use these commands at linux prompt:

ftp
open tremplin.epfl.ch
FoodImage@grebvm2.epfl.ch
Cahc1moo
get Food-11.zip

... Link (4 comments) ... Comment


Wednesday, 7. August 2019
Remove old backup files

Cron entry to remove all files in /home/ folder that starts with 'bk_all_dbProdSlave' and not created in the last 2 days.

59 22 find /home/ -name bkall_dbProdSlave\ -mtime +2 -exec rm -f {} \;

Similar as above to remove compressed files:

find /home -type f ( -name ".sql.gz" -o -name ".tar.gz" -mtime +10 ) -exec rm -rf {} \;

... Link (5 comments) ... Comment


Monday, 5. August 2019
Types in AWS CNF

List of important Types in Amazon Cloud Formation tool:

IAM (User, Group, Policy, AccessKey, Role)
Athena (NamedQuery)
Route53 (RecordSetGroup)
EC2 (SecurityGroup::Id, KeyPair::KeyName, SpotFleet)
Lambda (Function, Permission)
Events (Rule)
ApiGateway (RestApi, Method, Deployment)
Logs (LogGroup)

... Link (10 comments) ... Comment


Tuesday, 25. June 2019
codes used for classification

Standard codes used for classification:
1 SC
2 OBC
3 SBC
4 VJNT
5 ST
6 OPEN
7 Orphan

... Link (5 comments) ... Comment


Sunday, 2. June 2019
Shell scripting basics

Here are 8 important concepts of Shell scripting that everyone should know.

1) Exit Code Status $?
2) here_doc
3) if_else

if [[ $mystatus = 'No' ]];then
echo "slave down"
else
echo "slave ok"
fi

4) For loop

for i in ls
do
cp $path$i $new_path
done

5) Positional Parameters $1, $2, $#, $@

6) Variables

7) Functions
stop()
(
for socket in {2..9}
do
mysqladmin shutdown $socket
done
)

8) Globbing - t?est [ab] [a-c] [^ab] {b,c,test*}

... Link (9 comments) ... Comment


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