/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

10 votes366 views1 answer
Sh wait 10 seconds
Shell/Bash
0 vote335 views3 answers
Ubuntu server configure cordova android
Shell/Bash
1 vote402 views1 answer
Git add -A ignore large files
Shell/Bash
0 vote365 views1 answer
Nodejs new version error overwrite old
Shell/Bash
1 vote349 views2 answers
Log apache2 ubuntu
Shell/Bash
21 votes349 views4 answers
Ng bootstrap
Shell/Bash
11 votes317 views16 answers
Matrial ui
Shell/Bash
0 vote307 views2 answers
How to remove mongodb in ubuntu
Shell/Bash
0 vote410 views1 answer
Windows remove pip
Shell/Bash
113 votes352 views6 answers
Git config
Shell/Bash