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'.

Free Practice Exam Questions | AWS SysOps Administrator Associate
https://digitalcloud.training/aws-sysops-administrator-associate-free-practice-exam-questions/

How to Build an Auto-scaling Group of AWS EC2 Instance | by Hasan Cheema | Oct, 2022 | Towards AWS
https://towardsaws.com/how-to-build-an-auto-scaling-group-of-aws-ec2-instance-a71956c1a31

Linux Administrator job description template | TalentLyft
https://www.talentlyft.com/en/resources/linux-administrator-job-description

How to handle P1, Major Issues (MI), and SLA-based issues?
https://www.maximaconsulting.com/newsroom/how-to-handle-p1-incidents-sla-issues#:~:text=1)%20The%20Application%20teams%20reach,the%20global%20application%2Fdatabase%20environments.

How to monitor an xDSL Modem using a Prometheus Exporter plugin and Grafana Agent on Grafana Cloud with Grafana OnCall | Grafana Labs
https://grafana.com/blog/2023/03/17/how-to-monitor-an-xdsl-modem-using-a-prometheus-exporter-plugin-and-grafana-agent-on-grafana-cloud-with-grafana-oncall/

How to create an email alert for SSH logins | TechRepublic
https://www.techrepublic.com/article/how-to-create-an-email-alert-for-ssh-logins/

Network Devices (Hub, Repeater, Bridge, Switch, Router, Gateways and Brouter) - GeeksforGeeks
https://www.geeksforgeeks.org/network-devices-hub-repeater-bridge-switch-router-gateways/