concatenate variables

Shell Programming and Scripting
1

I need to know how to concatenate variables in Debian. I am making a interactive script where it ask the user for info to add a user I pull the first letter from the first middle and last name into individual variables now i want to put them all in one variable so i can put it into useradd command

This is what happening

v1= echo $firstname |  cut -b 1
 v2= echo $lastname |  cut -b 1
 v3= echo $middlename |  cut -b 1
 uname= $v1 $v2 $3
 echo $uname

output:
a
d
s

I need the output to look like this
output:
ads

Thanks in advance

2

I need to know how to concatenate variables in Debian. I am making a interactive script where it ask the user for info to add a user I pull the first letter from the first middle and last name into individual variables now i want to put them all in one variable so i can put it into useradd command

This is what happening

v1= echo $firstname |  cut -b 1
 v2= echo $lastname |  cut -b 1
 v3= echo $middlename |  cut -b 1
 uname= $v1 $v2 $3
 echo $uname

output:
a
d
s

I need the output to look like this
output:
ads

Thanks in advance

3

Please use code tags, please do not double post, and consider reading the rules of the forum.

4

Your shell is bash, this gives the result of the first character from each of three variables concatenated

result=${firstname,0,1}${middlename,0,1}${lastname,0,1}
5

If you want to do it like in your own example your left out a couple of things and there were too many spaces:

v1=$(echo "$firstname"  | cut -b 1)
v2=$(echo "$lastname"   | cut -b 1)
v3=$(echo "$middlename" | cut -b 1)
uname=$v1$v2$v3
echo "$uname"

Jim's example should have : instead of , then it should work