/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 votes305 views3 answers
How to change git author
Shell/Bash
3 votes311 views4 answers
Linux count files in directory
Shell/Bash
0 vote310 views1 answer
How to remove all images in folder mac terminal
Shell/Bash
0 vote279 views1 answer
Yum list installed packages from specific repo
Shell/Bash
13 votes611 views1 answer
Firewall not enabled (skipping reload)
Shell/Bash
48 votes339 views4 answers
Create postgres user windows
Shell/Bash
2 votes295 views1 answer
Env file firebase
Shell/Bash
95 votes267 views6 answers
Docker delete all images
Shell/Bash
0 vote280 views1 answer
Git enable lfs
Shell/Bash
3 votes288 views1 answer
.run files in ubuntu
Shell/Bash