lower case to uppercase conversion [duplicate]

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, Commented Oct 11, 2012 at 17:50

user1598202 · Accepted Answer · 2012-10-11 17:49:43Z

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, 2012 at 17:49

user1598202

2501 silver badge2 bronze badges

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
Commented Oct 11, 2012 at 17:51
@user1598202 - +1: great reply!
– paulsm4
Commented Oct 11, 2012 at 17:54

Add a comment |

Satish · Accepted Answer · 2012-10-11 18:38:43Z

0

I found following one! and it works!

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

Thanks for reply all.

answered Oct 11, 2012 at 18:38

Satish

17.1k30 gold badges99 silver badges156 bronze badges

Add a comment |

2 Answers 2