notes/session-21.txt at main · daws-84s/notes · GitHub

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/home/ec2-user/.local/bin
:/home/ec2-user/bin:
/usr/local/bin
:/usr/bin
:/usr/local/sbin
:/usr/sbin

Crontab
========
/usr/bin:/bin

recently I was given a script to create backup of the files, I successfully created the script and shceduled in crontab, but command not found in crontab. When I executed it is working fine manually. Later I understood PATH is bare minimum in crontab so I changed my script as command into /usr/bin directory. It started working fine..

prvd csgx rbzj ghyq

defaults
auth           on
tls            on
tls_trust_file /etc/ssl/certs/ca-bundle.crt
logfile        /var/log/msmtp.log

account        gmail
host           smtp.gmail.com
port           587
from           your_from_email@gmail.com
user           your_from_email@gmail.com
password       app-password

account default : gmail

{
echo "To: <your-to-email>"
echo "Subject: Test Email"
echo "Content-Type: text/html"
echo ""
echo "This is test email from Shell scripting session"
} | msmtp "<your-to-email>"

/var/log is consuming more than 80%

Hi DevOps Team,

There is High Disk Usage alert in the system. Please check

High Disk Usage on /run: 2
High Disk Usage on /: 30
High Disk Usage on /var: 22
High Disk Usage on /var/tmp: 3
High Disk Usage on /home: 5
High Disk Usage on /var/log: 4
High Disk Usage on /boot: 53
High Disk Usage on /boot/efi: 6
High Disk Usage on /var/log/audit: 2

Regards,
Monitoring Team

https://www.onlinewebtoolkit.com/text-to-html

Configuration Management
========================
Provision server

system packages install
programming runtime install
application folders, users,etc
download the code
install dependencies
create service files
start the server

deployment
=======================
stop the service
1. remove the old version
2. download the new version, install dependencies
3. start the server

disadvantages
================
not idempotent
poor error handling
if we have more servers, very difficult to run --> not scalable
scripts works only for specific distro --> homogenous
syntax is little tough
password security is poor

Configuration Management Tools --> ansible, chef, rundeck, puppet, etc...