Shell scripingby harsha
Important points only: Variables in shell can be accessed by below 3 ways: echo $A echo ${A} echo "${A}" If you want variable subsitution in string use double quotes, single quotes will not substiute value it will print symbol itself ❯ echo "Value of a is ${A}" Value of a is 100 ❯ echo 'Value of a is ${A}' Value of a is ${A} The ‘ -e ‘ option in Linux acts as an interpretation of escaped characters that are backslashed. Using option ‘\b‘ – backspace with backslash interpretor ‘-e‘ which removes all the spaces in between. $ echo -e "Tecmint \bis \ba \bcommunity \bof \bLinux \bNerds" TecmintisacommunityofLinuxNerds Using option ‘ \n ‘ – New line with backspace interpretor ‘ -e ‘ treats new line from where it is used. $ echo -e "Tecmint \nis \na \ncommunity \nof \nLinux \nNerds" Tecmint is a community of Linux Nerds