biggest file in linux command

here are a few Linux console commands (bash commands) to help you to find some biggest files:

use the "find"

find . -type f -size +50M

find – is the command obviously 
. – where to start the search
-type – a type of what to check
-size – Select files with a size below or an equal size

use the "du" and "sort"

du -h --max-depth=1 | sort -hr

links:
https://www.devopsroles.com/find-large-files-linux/
https://www.tomshardware.com/how-to/find-large-files-linux
https://www.cyberciti.biz/faq/linux-find-largest-file-in-directory-recursively-using-find-du/

To check a Linux kernel

 Quick tutor on how to get data about Linux kernel

# uname -r
3.10.0–1062.el7.x86_64

# cat /proc/version
Linux version 3.10.0–1062.el7.x86_64 (mockbuild@x86–040.build.eng.bos.redhat.com) (gcc version 4.8.5 20150623 (Red Hat 4.8.5–39) (GCC) ) #1 SMP Thu Jul 18 20:25:13 UTC 2019

# hostnamectl | grep Kernel
Kernel: Linux 3.10.0–1062.el7.x86_64

screen Linux command

 This command is useful in cases where you need to leave some command in the running state, our command history is significantly important

Check if a system already running screens

screen -ls

Create/run a new screen console:

screen -S <screen-in-name>

Re-attach the screen:

screen -r <screen-in-name>

Kill screen session

screen -XS <screen-in-name> quit

useful links:
https://quickref.me/screen

to check open ports in Linux

# netstat -nlptu

# ss -nlptu

# nmap -sTU localhost

# lsof -i

check threads or core in Linux

 HW details on Linux (kernel):

echo "Threads/core: $(nproc --all)"            

lscpu | grep CPU