Trim leading and trailing whitespace using sed

sed -i 's/^[ \t]*//;s/[ \t]*$//' filename

Create simple webserver in python

To create simple web server in python run below command in shell
python -m SimpleHTTPServer 5000
this will start serving pages at the address http://localhost:5000 and will show files from the location from where command is ran.

How to set/unset Windows 10 to boot in safe mode using command prompt

After reboot press ESC then F11 to enter system recovery mode, then select Troubleshooting then "Advanced Options" then "Command Prompt".

After command prompt appears type following
bcdedit /set {default} safeboot minimal and press Enter. or
bcdedit /set {default} safeboot network and press Enter. or
bcdedit /set {default} safebootalternateshell yes and press Enter.

Close command prompt

On "Choose an option" screen press Continue

To Unset the safe mode booting, follow above steps till command prompt and then enter command
bcdedit /deletevalue {default} safeboot and press Enter.

Sher

लाजवाब है मेरी जिंदगी का फसाना,
कोई सीखे मुझसे हर पल मुस्कुराना,
पर कोई मेरी हंसी को नजर न लगाना,
बहुत दर्द सहकर सीखा है मुस्कुराना....!!!!

Split single line into multiple lines separated with ;

cat t.txt | xargs | sed 's/;/\n/g'

Combine multiple lines into single line separated using ;

cat t.txt |xargs | sed -e 's/\n/;/g'

How to get print from android makefile

Add below line to get print from android makefile
$(info "I want this print")