/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

1 vote258 views1 answer
Uninstall k3s
Shell/Bash
0 vote190 views1 answer
Git alias - multiple commands
Shell/Bash
0 vote213 views1 answer
Source code management tools
Shell/Bash
2 votes238 views1 answer
How to revert last pushed commit
Shell/Bash
6 votes204 views3 answers
How to completely remove apps ubuntu package
Shell/Bash
0 vote206 views1 answer
Nvm install latest node and keep global packages
Shell/Bash
2 votes198 views2 answers
Chromium for linux
Shell/Bash
1 vote229 views3 answers
Command prompt post request
Shell/Bash
-2 votes191 views1 answer
Kali linux change keyboard layout
Shell/Bash
0 vote180 views1 answer
Open first image in directory linux
Shell/Bash