TechNow Tamil

02/05/2026

Linux administrator job interview preparation course tamil | Free

26/03/2026

21/03/2026

Day 6/20: Read Files in Terminal

Commands covered:
cat file.txt- Display entire file content
cat -n- Show with line numbers
head- First 10 lines of a file
head -n 5-First N lines you specify
tail-Last 10 lines of a file
tail -n 3- Last N lines you specify
tail -f-Live log monitoring (real-time!)
wc-1-Count total lines in file

tail -f is used on every production server for live log monitoring!

17/03/2026

Day 5/10: cp, mv & rm Commands ⚡

Commands covered:
cp file.txt backup.txt - Copy file
cp -r dir1/ dir2/ - Copy directory
mv old.txt new.txt - Rename file
mv file.txt /tmp/ - Move to another dir
rm file.txt - Delete (no recycle bin!)
rm -r mydir/ - Delete directory
rm -i file.txt - Safe delete (asks first)
cp -v src dst - Verbose copy

⚠️ NEVER run rm -rf / on any server!

💡 Always use rm -i for important files!

🎓 Full course in Tamil - ₹299 | Link in bio

14/03/2026

Old Notebook 😊
Mar 2022

Notes prepared for my Linux Training session!

Behind every class... There are hours of preparation!

11/03/2026

Day 4/10: mkdir & touch Commands ✨

Commands covered:
mkdir project - Create a directory
mkdir -p a/b/c - Nested dirs in one shot!
touch notes.txt - Create empty file
touch f1.txt f2.txt - Multiple files
mkdir -m 755 secure - With permissions
mkdir logs backups - Multiple dirs
tree - View directory structure

💡 mkdir -p is a lifesaver - creates parent dirs automatically!

🎓 Full course in Tamil - ₹299 | Link in bio

10/03/2026

Day 3/10: cd Command Mastery 📂

Commands covered:
cd /home - Go to specific path
cd .. - Go back one level
cd ~ - Jump to home directory
cd - - Toggle between last 2 dirs
cd /var/log - System logs
cd /etc - Config files directory
cd /tmp - Temporary files

💡 Pro tip: cd ~ and cd (empty) both take you home!

🎓 Full course in Tamil - ₹299 | Link in bio

09/03/2026

Day 2/10: ls Command Variations 📁

List contents in Terminal using ls command.

Commands covered:
ls - Basic listing
ls -l - Long format with permissions
ls -a - Show hidden files
ls -la - The MOST used combination!
ls -lh - Human readable sizes
ls -lt - Sort by time
ls -lS - Sort by size
ls -R - Recursive listing

💡 Interview tip: "How to see hidden files?" → ls -a

🎓 Full course in Tamil - ₹299 | Link in bio

16/01/2026

Hardware RAID

11/02/2023

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