/Shell/Bash/Bash uppercase bad substitution

Bash uppercase bad substitution

var=hello #For Bash Version higher than 4.3.33 try these
echo ${var''} #Uppercase whole string
HELLO
echo ${var'} #Uppercase only first char of string
Hello
var2=BYE
echo ${var2,} #Lowercase whole string
bye
echo ${var2,,} #Lowercase only first char of string
bYE
echo $var | tr 'a-z' 'A-Z' #For lower versions of Bash just use tr command
HELLO

Similar codes

3 votes128 views1 answer
Conda install environment without base packages
Shell/Bash
4 votes133 views4 answers
Kill all screens linux
Shell/Bash
0 vote116 views1 answer
Error: Cannot find module 'web-push'
Shell/Bash
0 vote117 views1 answer
Zmq.hpp not found
Shell/Bash
0 vote144 views1 answer
How to register nuget repository powershell
Shell/Bash
0 vote125 views1 answer
Hpw to install fast.ai
Shell/Bash
0 vote135 views1 answer
Instalar ultima version de npm
Shell/Bash
0 vote123 views1 answer
How to save file in linux
Shell/Bash
2 votes121 views2 answers
Self-documenting makefile
Shell/Bash
6 votes101 views1 answer
Apt-get update after upgrade
Shell/Bash