lower case to uppercase conversion

Question

[root@mg0016 tmp]# y="this Is A test"
[root@mg0016 tmp]# echo "${y^^}"
-bash: ${y^^}: bad substitution

`y="this Is A test"; y=${echo $y|tr "a-z" "A-Z"}`;echo y: $y` — paulsm4, Oct 11 '12 at 17:50

score 2 · Accepted Answer · answered Oct 11 '12 at 17:49

2

You can use any one of the following code :

$ tr '[:lower:]' '[:upper:]' < input.txt > output.txt

or

$  sed -e 's/\(.*\)/\U\1/' input.txt > output.txt

answered Oct 11 '12 at 17:49

user1598202

1

The sed form isn't very portable (AFAIK it's GNU sed specific). The portable sed version would be `sed -e 'y/abcdefghijklmnopqrstuvwxyz/ABCDEFGHIJKLMNOPQRSTUVWXYZ/' input.txt > output.txt`. – Janito Vaqueiro Ferreira Filho Oct 11 '12 at 17:51
@user1598202 - +1: great reply! – paulsm4 Oct 11 '12 at 17:54

score 0 · Answer 2 · answered Oct 11 '12 at 18:38

0

I found following one! and it works!

[spatel@mg0016 ~]$ echo "lower" | awk '{print toupper($0)}'
LOWER

Thanks for reply all.

answered Oct 11 '12 at 18:38

Satish

2 Answers2