SSL/TLS Strong Encryption: How-To - Apache HTTP Server Version 2.4
https://httpd.apache.org/docs/2.4/ssl/ssl_howto.html

Look what I shared: Representational state transfer (REST) and Simple Object Access Protocol (SOAP) - Stack Overflow @MIUI| https://stackoverflow.com/questions/209905/representational-state-transfer-rest-and-simple-object-access-protocol-soap

https://fedoramagazine.org/upgrading-fedora-28-fedora-29/
Upgrading Fedora 28 to Fedora 29

history -c # clear your active shell's history in case you do something stupid like paste a password+newline into your terminal.

Understanding the DNS Process | Liquid Web
https://www.liquidweb.com/kb/understanding-the-dns-process/

How to Reboot Linux Using the Command Line | Linuxize
https://linuxize.com/post/reboot-linux-using-command-line/

35 Practical Examples of Linux Find Command
https://www.tecmint.com/35-practical-examples-of-linux-find-command/

Hi all
This is public group created to learn and earn Linux knowledge. Hope henceforth everybody will active and follow Moto of this group.

Show top 50 running processes ordered by highest memory/cpu usage refreshing every 1s

watch -n1 "ps aux --sort=-%mem,-%cpu | head -n 50"

Hi everybody,
You may put your questions/doubt here and those who knows ans, they can explain.

VMware vSphere vs Proxmox: Which is best for your business? | IT PRO
https://www.itpro.co.uk/virtualisation/34516/vmware-vsphere-vs-proxmox-which-is-best-for-your-business

Print an access_log with indicator chart bars under each request line to show the size of the data transfer using log() to keep things "in control".



# awk -v cols=$(tput cols) '{e=int(log($10)*5); print("\x1b[42m" substr($0, 1, e) "\x1b[0m" substr($0, e+1) )}' access_log | less -SR

# tesseract book-text1.jpg



- # You can use the tesseract OCR software to attempt to read text from an image and print it on stdout.

# watch grep [M]Hz /proc/cpuinfo; free; ifconfig <any other command you wanna monitor>

# stat -c "%F"$'\t'"%15s"$'\t'"%n" -- * | awk -F"[\t\.]+" '/^regular file.*\..{1,5}$/{t[$NF]+=$2;x[$NF]++} END {for (s in t){printf("%-5s %4i %12i\n",s,x[s],t[s])}}' | sort -k3n



Command to See what type of files are taking up so much space. output columns = type count

If you want to clean empty directories, find command can make the job easy:

$ find / -type d -empty -exec rmdir {} +

The -type d option searches for directories, -empty select empty ones and -exec rmdir {} executes the rmdir command to delete them. The rmdir command ensures that the directory is empty before deleting it.



Alternatively, you can also use below command to complete the same task:

$ find / -type d -empty -delete

Linux and Unix Test Disk I/O Performance With dd Command - nixCraft
https://www.cyberciti.biz/faq/howto-linux-unix-test-disk-performance-with-dd-command/

Two files in different formats (eg. TSV vs. CSV) and need to find out if file1 had lines that were not in file2.


join -v1 --header -t, -1 2 -2 1 <( sort -t, -k2 files1.csv | cut -d, -f1-5 ) <( sed 's/\t/,/g' files2.tsv | sort -t, -k1 )

Regex Tip


[a-z] matches all lower case letters. [-az] matches '-', 'a', or 'z'.