Notices by Yes, I Know IT ! 🎓 (yesiknowit@mastodon.social), page 3

Test Your GitHub Repositories with Docker in 5 Minutes

https://developer.okta.com/blog/2018/09/27/test-your-github-repositories-with-docker-in-five-minutes
#Docker #Git #GitHub #Deployment

I'm not into gaming, but apparently, Linux is gaining shares on that market too.

I'm not sure though if it is about games developed for Linux. Or about running Windows games on Linux.
https://www.youtube.com/watch?v=IWJUphbYnpg

#Linux #Gaming

I'm a regular used of `hexdump` to view an hexadecimal dump of a file.
But I wasn't aware of the `hexcurse` hexadecimal *editor*.

https://www.maketecheasier.com/using-hex-editor-linux
#hexcurse #ghex #hexadecimal #editor #linux

Another excellent cheatsheet by Jeremy Stretch:

http://packetlife.net/media/library/6/IPsec.pdf
Follow him on Twitter (https://twitter.com/packetlife/) and check his website for more (http://packetlife.net/)
#IPSec #IP #Network #Security #Layer #Cheatsheet

If your work is even slightly network-related, you should know how to use Wireshark .

Take a look at that tutorial to learn more:
https://www.howtogeek.com/107945/how-to-identify-network-abuse-with-wireshark/
by Chris Hoffman (https://twitter.com/chrisbhoffman)
#Wireshark #Network #Scanning

`sed` is a great tool -- but the syntax is not always obvious.

Whether you're a beginner or a more advanced user looking for a memory
aid, this cheatsheet will help you remember the most basic `sed` commands:
https://www.yesik.it/SEDCS1

#Sed #Cheatsheet #Linux #Shell

Install NodeJS from the sources on your Linux box. Useful if you need a very specific version of NodeJS (or simply, if you want to try out the latest cutting-edge version).
That's also a very good way to make your first steps in installing software from sources! Aspiring developers will even be happy to make their first change to the source of NodeJS, to impress their peer with a customized version message ;)

https://itsfoss.com/install-software-from-source-code/
#Linux #Compiling #NodeJS

In your #shell, the `type` build-in command shows how a name would be interpreted if used as a
command name:

type cd ls rm adb
=> cd is a shell builtin
=> ls is aliased to `ls --color=auto'
=> rm is hashed (/bin/rm)
=> adb is /opt/android-sdk-linux/platform-tools/adb

In #Bash, to edit the last three commands in your favorite EDITOR type:

fc -3 0

When leaving the editor, commands are executed

`less -R` will handle gracefully ANSI "color" escape sequences:
ls --color=always /tmp | less -R

#Linux #Shell #ls

seq 10 | awk NR%2
Keep odd lines of a file

#AWK #Shell

If you ever had to connect to an Oracle backend, you may know how painful it used to be to set up an Oracle Instance on your test/dev host.

Thanks to @Docker, it is now several orders of magnitude simpler!

https://yesik.it/EP18

#Oracle #Database
#Docker #Container
#Linux

How to use the `chattr` command to secure shared files. An interesting post by Himanshu Arora on HowtoForge.
https://www.howtoforge.com/linux-chattr-command/

BTW, `chattr` has not to be confused with `chmod`!

#Chattr #Linux #Utility

In Bash `$(<file)` is equivalent to `$(cat file)`, but faster:

P=( $(</etc/passwd) )
echo ${P[0]}

#Bash #Linux #Cat

Check your Bash skills and challenge your friends:
https://www.yesik.it/BASH-IT-OUT

#Bash #Shell #Challenge #Puzzle #Linux
#YesIKnowIT @itsfoss2

In a #sed substitution pattern, you can use any character as a separator instead of /
Useful for path or urls:
s!/usr/local!/opt!

#Linux #UNIX

Very great description of the difference between VMs and Containers
by @mikegcoleman
https://blog.docker.com/2016/03/containers-are-not-vms/

#Docker #Containers

From a POSIX shell `$OLDPWD` holds the name of the previous working directory:
cd /tmp
echo You are here: $PWD
echo You were here: $OLDPWD
cd $OLDPWD

#Unix #Linux #Shell #cd

When using the find command, use `-iname` instead of `-name` for case-insensitive search
#Unix #Linux #Shell #Find

If you ever had to connect to an Oracle backend, you may know how painful it used to be to set up an Oracle Instance on your test/dev host.

Thanks to @Docker, it is now several orders of magnitude simpler!

https://www.yesik.it/EP18

#Oracle #Database
#Docker #Container
#Linux
#YesIKnowIT