mercredi 27 janvier 2021
Is Serverless with Lambda, the “silver bullet”?
Par Arnaud Charlier, mercredi 27 janvier 2021 à 11:00 :: AWS
My first Medium Article on Serverless Lambda.
Is Serverless with Lambda, the “silver bullet”?
lundi 11 janvier 2021
Excel SUM With Filtered Fields
Par Arnaud Charlier, lundi 11 janvier 2021 à 18:37 :: Un peu de tout
sample:
=SUBTOTAL(109;G2:G2054)https://www.excelcse.com/excel-subtotal-function/
jeudi 2 juillet 2020
Latest Command Line
Par Arnaud Charlier, jeudi 2 juillet 2020 à 16:43 :: Linux et Debian
du -sh /*
control-rRun task in Background
nohup command
Inotify
https://manpages.ubuntu.com/manpages/bionic/man1/inotifywait.1.htmllundi 18 mai 2020
Read file without comment
Par Arnaud Charlier, lundi 18 mai 2020 à 18:19 :: Linux et Debian
Usefull to drop all comment from php.ini file and long configuration with lot of comments.
Thank you Pierre Renard !
mercredi 5 février 2020
Some usefull tool to install on Unix
Par Arnaud Charlier, mercredi 5 février 2020 à 14:21 :: Linux et Debian
- htop
- ncdu
- glances
- httpstat
jeudi 11 juillet 2019
Elastic Beanstalk : Some fail
Par Arnaud Charlier, jeudi 11 juillet 2019 à 01:13 :: Linux et Debian
List of tips and tricks hardly discovered setting up a Elastic Beanstalk
mardi 2 juillet 2019
EFS Performance Test
Par Arnaud Charlier, mardi 2 juillet 2019 à 12:19 :: Linux et Debian
Related EFS test performance
Tuning Linux server
Par Arnaud Charlier, mardi 2 juillet 2019 à 10:20 :: Linux et Debian
Some configuration to tune
vendredi 28 juin 2019
AWS Athena : Partition
Par Arnaud Charlier, vendredi 28 juin 2019 à 11:46 :: Linux et Debian
Quick Tips AWS athena
jeudi 20 juin 2019
Increase Ulimit to solve heavy http traffic
Par Arnaud Charlier, jeudi 20 juin 2019 à 12:44 :: Linux et Debian
Check some values
See ulimit , also per usersudo su {user}
#all limit
ulimit -a
#Ulimite -hard:
ulimit -Hn
#Ulimite -Soft:
ulimit -Sn
List open file per process or per user
lsof -p {pid}| wc -l
lsof -u {youruser} |wc -l
List Network connection per state
netstat -an|awk '/tcp/ {print $6}'|sort|uniq -c
List php-fpm process running
ps aux | grep php-fpm | wc -l
Apply Ulimit change
sudo vi /etc/security/limits.conf * soft nofile 65000 //for all user user soft nofile 5000 // for a specific user
Too many connection in time-wait
This should not be too problematic according source below.
One solution will be to open the service on several port and balance connexion to several port.
Some source
https://www.netadmintools.com/art295.html
https://medium.com/@muhammadtriwibowo/set-permanently-ulimit-n-open-files-in-ubuntu-4d61064429a
https://app.getpocket.com/read/2383097919
Some source
https://www.netadmintools.com/art295.htmlhttps://medium.com/@muhammadtriwibowo/set-permanently-ulimit-n-open-files-in-ubuntu-4d61064429a
https://app.getpocket.com/read/2383097919
mercredi 10 avril 2019
ssh-agent
Par Arnaud Charlier, mercredi 10 avril 2019 à 22:57 :: Linux et Debian
In order to use the ssh-key in Bastion and leap-frog to protected server
Make sure the ssh agent is runningeval `ssh-agent -s`then add your key
ssh-add -k your-key.pem ssh-add -LThen use the ssh agent
ssh -A ec2-user@your-iphttps://www.daveeddy.com/2017/10/18/persistent-sshagent-on-bash-on-ubuntu-on-windows/ https://medium.com/@crishantha/handing-bastion-hosts-on-aws-via-ssh-agent-forwarding-f1d2d4e8622a
mercredi 20 février 2019
Elasticsearch quorum : Split Brain
Par Arnaud Charlier, mercredi 20 février 2019 à 19:00 :: AWS
A quorum is Number of Dedicated Master Nodes / 2 + 1 (rounded down to the nearest whole number), which Amazon ES sets to discovery.zen.minimum_master_nodes when you create your domain.
In this case, 2 / 2 + 1 = 2. Because one dedicated master node has failed and only one backup exists, the cluster does not have a quorum and cannot elect a new master. nearest whole number),
which Amazon ES sets to discovery.zen.minimum_master_nodes when you create your domain.
https://qbox.io/blog/split-brain-problem-elasticsearch
vendredi 1 février 2019
Monitor progress on copy DD command
Par Arnaud Charlier, vendredi 1 février 2019 à 13:07 :: Linux et Debian
When you use dd copy,
dd if=/dev/xvdf of=/dev/xvdg bs=4096just monitor progress this way.
watch -n5 'sudo kill -USR1 $(pgrep ^dd)'Some more fancy progress tools : https://www.cyberciti.biz/faq/linux-unix-dd-command-show-progress-while-coping/
vendredi 18 janvier 2019
Root User Name AMI on AWS
Par Arnaud Charlier, vendredi 18 janvier 2019 à 12:02 :: Linux et Debian
et the default user name for the AMI that you used to launch your instance
For Amazon Linux 2 or the Amazon Linux AMI, the user name is ec2-user. For a Centos AMI, the user name is centos. For a Debian AMI, the user name is admin or root. For a Fedora AMI, the user name is ec2-user or fedora.For a RHEL AMI, the user name is ec2-user or root. For a SUSE AMI, the user name is ec2-user or root. For an Ubuntu AMI, the user name is ubuntu. Otherwise, if ec2-user and root don't work, check with the AMI provider.
vendredi 11 janvier 2019
Using Mapping into Cloudformation, and openapi Yaml
Par Arnaud Charlier, vendredi 11 janvier 2019 à 13:32 :: AWS
How to declare a mapping in your cloudformation and use it in your Linked openapi.yml file