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How to cut a string from a variable

 
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# 1  
Old 02-01-2012
MySQL How to cut a string from a variable
I want to cut column 1 to 5
Code:
echo $somevariable | cut -c 1-5

not working
# 2  
Old 02-01-2012
What is your input? What is the output you want? In what way is it "not working"?
# 3  
Old 02-01-2012
Input is line like

Code:
somevariable="0110SH"

# 4  
Old 02-01-2012
You want column or character?
Code:
root@bt> echo "123456789" | cut -c1-5
12345

root@bt> echo "1 2 3 4 5 6 7 8 9" | cut -f1-5 -d" "
1 2 3 4 5

--ahamed
# 5  
Old 02-01-2012
my line is coming is coming as:
Code:
line=01100S

Code I am using is :
Code:
while read line 
do
i=`$line | cut -c 1-5`    #Command not found
if[ ($line | cut -c 1-5) -eq "01100" ]    #not working
then
    echo "PASS"
fi
done < file_name

# 6  
Old 02-01-2012
Code:
i=`echo $line | cut -c1-5`

--ahamed
This User Gave Thanks to ahamed101 For This Post:
ezee
# 7  
Old 02-01-2012
Quote:
Originally Posted by ezee
my line is coming is coming as:
Code:
line=01100S

Code I am using is :
Code:
while read line 
do
i=`echo $line | cut -c 1-5`    #Command not found
if [ `echo $line | cut -c 1-5` -eq "01100" ]    #not working
then
    echo "PASS"
fi
done < file_name

You also need a space before the square bracket.

Actually if your shell supports string operations, you might find this simpler and save a cpl of processes
Code:
i=${line:0:5}

Code:
${string:position:length}Extract $length characters substring from $string at $position [zero-indexed, first character is at position 0]

Great reference here I got from another post: http://tldp.org/LDP/abs/html/refcards.html#AEN22518
This User Gave Thanks to gary_w For This Post:
ezee
 
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