Blog et Aide mémoire informatique

du -sh /* 

control-r

nohup command

Inotify

Lire la suite

• HTTPIE
• htop
• ncdu
• glances
• httpstat

Lire la suite

Lire la suite

Lire la suite

Lire la suite

Check some values

sudo su {user} 
#all limit
ulimit -a

#Ulimite -hard: 
ulimit -Hn

#Ulimite -Soft: 
ulimit -Sn

lsof -p {pid}| wc -l
lsof -u {youruser} |wc -l

netstat -an|awk '/tcp/ {print $6}'|sort|uniq -c

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

In order to use the ssh-key in Bastion and leap-frog to protected server

eval `ssh-agent -s`

ssh-add -k your-key.pem
ssh-add -L

ssh -A ec2-user@your-ip

dd if=/dev/xvdf of=/dev/xvdg bs=4096 

watch -n5 'sudo kill -USR1 $(pgrep ^dd)'

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.

docker run --rm   --name pg-docker 
-e POSTGRES_PASSWORD=docker 
-d -p 5432:5432 
-v $HOME/docker/volumes/postgres:/var/lib/postgresql/data  postgres

SELECT datname FROM pg_database
WHERE datistemplate = false;

SELECT schema_name FROM information_schema.schemata;

SELECT * FROM pg_catalog.pg_tables

SELECT column_name, data_type, character_maximum_length
FROM INFORMATION_SCHEMA.COLUMNS
WHERE table_name = '';

svn log -q https://yourRepoUrl | awk -F '|' '/^r/ {sub("^ ", "", $2); sub(" $", "", $2); print $2" = "$2" <"$2">"}' | sort -u > authors-transform.txt

git svn --authors-file=authors-transform.txt clone https://yourRepoUrl   --trunk=trunk --branches=branches --tags=tags

git branch -a

git checkout remotes/origin/v2
git checkout master

git branch v2 remotes/origin/v2

git remote add origin https://user@gitRepos/theGitProject.git
git push -u origin master
git push --all
git push --tags

update-rc.d -f mongodb remove

chkconfing