Grep MAC and IP address
MAC Addressgrep -o -E “([[:xdigit:]]{1,2}:){5}[[:xdigit:]]{1,2}” found.txt IP Addressgrep -o -E “([0-9]{1,3}[\.]){3}[0-9]{1,3}” found.txt [\.] looks for a literal period.([0-9]{1,3}[\.]) can find the first octet.{3} three …
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Configure HTTP Strict Transport Security (HSTS) on Apache2
Enable Apache2 Headers Module Enabling HSTS for Apache2
Tips and tricks to tail -f /var/log/apache2/access.log
Top 10 who Top 10 from access.log with awk Include Exclude Exclude multiple strings Exclude and include
View and delete mail queue on Ubuntu server
Display mail queues View message in the Postfix queue Delete queued mail Force process the queue now (immediately send all queued messages)
Common Palo Alto firewall commands for troubleshooting
Common commands System info. Able to find the basic info like the followingIP address, model, serial number, Routing Show NAT ippool ping & traceroute
Fortigate CLI wan interface
Check current wan interface Allow admin access on wan interface Disable admin access on wan
fail2ban on Ubuntu
Configure my own jail sudo nano /etc/fail2ban/jail.local[mysqld-auth]enabled = truelogpath = /var/log/mysql/query.logfilter = mysqld-authport = 3306backend = %(mysql_backend)s Enable logging for mysql sudo nano /etc/mysql/mysql.conf.d/mysqld.cnf# Be …
Node.js
Install the following for dev. https://nodejs.org/en (Node itself) https://github.com/nvm-sh/nvm (Node Version manager)NVM is not supported on Windows so download below:https://github.com/coreybutler/nvm-windows Test installation node -vnpm -vnvm …
Django app deployment on Ubuntu
Global install sudo apt-get install apache2 python3-django libapache2-mod-wsgi-py3 virtualenv### MySQLsudo apt-get install mysql-server libmysqlclient-devmysql_secure_installation Virtual env setup Not testedsudo apt-get install python3-venv (doesn’t need. )sudo …
NTP for Windows server
Fix time on Windows server On Client