Shell Programming and Scripting

Hi, I am trying to use SED command on one string. But its not working for me. I have checked all the sites for examples, I have used almost all commands to get the output. but I could not.

My requirement is :

In the below string, I want to replace "." with ":"

16.04.38

Output should be 16:04:38

I used: echo "16.04.38" | sed 's/./:/'

It did not work. Can anyone please help me.

Thanks in advance.

Code:

echo "1.2.3" | tr -s '.' ':'
# escape the . in sed
echo "3.4.5" | sed 's/\./:/g'

Code:

echo "16.04.38" | sed 's/\./:/g'

in bash

Code:

bash$ a=16.04.38
bash$ echo ${a//./:}
16:04:38

Code:

echo 16.04.38 | awk -F. -vOFS=: '$1=$1'

Is AWK acceptable ?

I don't know if OP can or not use awk, it's just an alternative. Just in case...