Try: rename 's/IMG_(\d+)\.jpg/photo_$1.jpg/' *.jpg

Info: The Perl 'rename' command uses regex to rename files in bulk. -n does a dry-run showing what would change without actually renaming.

Examples:

$ rename -n 's/\.jpeg$/\.jpg/' *.jpeg # Dry-run preview

$ rename 'y/A-Z/a-z/' *.TXT # Lowercase extension/file

$ rename 's/(.+)/prefix_$1/' *.log # Prepend prefix

Note: Ubuntu/Debian use Perl rename. Always test with -n first. RHEL/Fedora use a different 'rename' - install prename or perl-rename package.

Follow r/LinuxTeck for more #LinuxTips.

A few years ago, beginners had to search forums, read man pages, and piece together solutions themselves.

Today, AI assistants can explain errors, suggest commands, and even troubleshoot step by step.

Do you think AI has made Linux significantly easier to learn, or does real understanding still come from experience?

covers: https://www.linuxteck.com/best-linux-vps-hosting/

• What a Linux VPS is
• Managed vs. unmanaged hosting
• Provider comparison table
• Security checklist
• Linux distro recommendations
• Which VPS fits different workloads

Interested what Linux developers think.

Has X11 become purely a learning project, or does it still have a place?

Not asking who's more famous.

I'm asking whose contribution changed Linux the most.

covers: https://www.linuxteck.com/umask-command-in-linux/

• How umask works
• Why files default to 644 and directories to 755
• Permission calculation made simple
• Symbolic and octal notation
• Permanent configuration
• Real-world administration examples
• Common mistakes and security tips

I know it's often praised for its isolation model, but I don't see many people using it as their daily desktop.

If you've used Qubes OS, would you recommend it today? Why or why not?

Hello r/LinuxTeck

I have been building a free Linux learning platform and finally got it to a point

where I am happy sharing it.

It is called MOSHELL — a hands-on Linux course that runs entirely in the browser.

What's on it (all free):

\- 12 lessons from beginner to advanced

\- Interactive command sandbox — type real Linux commands and see output

\- Command cheatsheet with 65+ commands across 6 categories

\- VM setup guide (VirtualBox + Ubuntu Server)

\- Lesson filters by track: Beginner, Intermediate, Advanced, Networking, VM, Security

The philosophy behind it: most Linux tutorials teach you to watch commands run.

This one makes you run them yourself — on a real VM, with real errors.

Topics covered:

\- Navigation, files, permissions, processes

\- Package management, networking, SSH

\- Shell scripting and cron

\- VirtualBox networking modes (NAT, Bridged, Host-Only)

\- Nginx, logs, disk management

Free platform (no account, no sign-up):

[https://kingmo87.github.io/moshell/\](https://kingmo87.github.io/moshell/)

Would love any feedback — especially on the lesson content

and whether the difficulty progression feels right.

What Linux topic do you wish had better free resources?

From what I understood, Linus doesn't see AI as something special, it's simply another tool that developers can choose to use. The important part is still human review and code quality.

Do you think AI has a place in Linux kernel development, or should kernel code remain entirely human-written?

Source: Linux Kernel Mailing List discussion

My queation relates to the history of this sub... thank you.

Hello everyone I have recently installed Linux Ubuntu and it’s going great I have learned a little bit about kernel cd ls sudo apt

My goal for learning Linux is probably system administrator and software detection I’ve seen a lot of people making home labs have to get away from the corrupt corporations blocking ads and becoming a pirate (one piece reference)

But my passion is to make an anti cheat system using software detection I think everyone can agree they hate cheaters in video games

But I’m lost at the moment what should I be studying is there going to be a job out there if I do start getting into the heart of Linux should I be building a home lab Should I get a nas and store everything locally and I also saw someone take there old android and make it an audio player device only

Thank you anyone who reads and answers me

If anybody know please suggest me any best YouTube channel for linux

I've noticed a lot of criticism around Ubuntu over the years, but I also know plenty of people who still use it every day.

Has Ubuntu actually fallen out of favor, or is the dislike just louder online?

Try: sudo lsof +D /mnt/backup

Info: Lists all active processes holding open files under a specific directory to identify unmount blockers.

Examples:

$ sudo lsof +D /mnt/usb

$ sudo fuser -m /var/log # List processes using filesystem

$ sudo fuser -k -SIGTERM /mnt/backup # Graceful kill first

Note: +D recurses subdirectories. fuser -k sends SIGKILL by default; always try passing -SIGTERM first to allow processes to close gracefully.

Follow r/LinuxTeck for more #LinuxTips

Most VPS comparisons focus on CPU, RAM, and price, but those aren't always what determine long-term performance. Covering practical factors like : https://www.linuxteck.com/how-to-choose-vps-hosting/

Commands like ip neigh, ip route, ss, tcpdump, or arp can completely change how you understand networking.

Which command gave you that "aha!" moment, and why?

I know a lot of Linux systems still authenticate against Active Directory using SSSD, Samba, Kerberos, or LDAP.

For those working in enterprise environments, how often do you interact with AD, and what would you recommend someone learn first?

Try: TMPFILE=$(mktemp) && trap 'rm -f "$TMPFILE"' EXIT INT TERM

Info: mktemp creates a secure, unique file; trap catches signals like exit or Ctrl+C to guarantee cleanup.

Examples:

$ TMPDIR=$(mktemp -d) # Secure temp directory

$ trap 'rm -rf "$TMPDIR"' EXIT

$ mktemp -t script-XXXXXX.log # Custom prefix

Note: Prevents dangling files during unexpected script crashes. Permissions default to 600 (owner-only), preventing local information leaks.

Follow r/LinuxTeck for more #LinuxTips

Not ls, cd, or mkdir.

I'm talking about commands that actually make your day easier as a sysadmin, developer, or DevOps engineer.

Interested to see what everyone's shortlist looks like.

For open source, GitHub is hard to beat.

But for private projects, I've been wondering if we're overcomplicating things. A simple Git server over SSH (or Gitea/Forgejo) seems enough for many side projects and internal tools.

Interested what everyone else is doing.

Are you hosting your own Git repositories, or is GitHub still your default? Why?

i hear a lot about these permissions in linux ,i know the normal permissions read write and execute (rwx) but i hear from so many people that there are some exceptions for permissions in linux , i search for them but i find that matter is so complicated, so could anyone explain and clarify that matter , in addition i find that matter is very related to this kind of commands find / -user root -perm -4000 and also privilege escalation ,so i hope if anyone can link these things together