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Full Discussion: How to remove part of the line from start of the line?
Top Forums Shell Programming and Scripting How to remove part of the line from start of the line? Post 302997950 by Aia on Tuesday 23rd of May 2017 09:15:26 AM
Old 05-23-2017
Read the first line and disregard what you do not want.
Code:
read _ _ _ sig < chetanojha.example

Now you have a variable named sig
Code:
$ echo $sig
OS8nJnqmzM5GLu0L8VHuKj6ZucZ1KGJXEhxzA9xk+4EUyFKYTkEMMGB93ybUsMP0f4nPp6MDF7wL8i4mHN9HGN58br6yEXNQk6+pUk5nM2Mids2xOyJqBjOWn2QBI7MHfiCxMRENAJXa3vUqZIQkRJWQeGOdmnYecGyf0HDuXTRgUMECSqoAhrsjWxg+ENJTyQlv79u7H9OrDB6jXCcekw9GNFslIULE5Oe1Jid4CV7YVwS4VCD5Ze000dVbFC0iqk7JQcAaEY+3CeQCn36aGpYj+TFFfpz/sLV7+PQnd8RrVK/1Si69OCrEe6+3xhb5Solxs8A4INmJb0YMfBIR8w==

---------- Post updated at 07:15 AM ---------- Previous update was at 06:59 AM ----------

Quote:
Originally Posted by Sumanthsv
Code:
cat testfile
signature Base64 : OS8nJnqmzM5GLu0L8VHuKj6ZucZ1KGJXEhxzA9xk+4EUyFKYTkEMMGB93ybUsMP0f4nPp6MDF7wL8i4mHN9HGN58br6yEXNQk6+pUk5nM2Mids2xOyJqBjOWn2QBI7MHfiCxMRENAJXa3vUqZIQkRJWQeGOdmnYecGyf0HDuXTRgUMECSqoAhrsjWxg+ENJTyQlv79u7H9OrDB6jXCcekw9GNFslIULE5Oe1Jid4CV7YVwS4VCD5Ze000dVbFC0iqk7JQcAaEY+3CeQCn36aGpYj+TFFfpz/sLV7+PQnd8RrVK/1Si69OCrEe6+3xhb5Solxs8A4INmJb0YMfBIR8w==
 signature hex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

Code:
cat testfile | awk -F ":" 'NR==1 {print $2}' | sed 's/^ //'

Output:

Code:
OS8nJnqmzM5GLu0L8VHuKj6ZucZ1KGJXEhxzA9xk+4EUyFKYTkEMMGB93ybUsMP0f4nPp6MDF7wL8i4mHN9HGN58br6yEXNQk6+pUk5nM2Mids2xOyJqBjOWn2QBI7MHfiCxMRENAJXa3vUqZIQkRJWQeGOdmnYecGyf0HDuXTRgUMECSqoAhrsjWxg+ENJTyQlv79u7H9OrDB6jXCcekw9GNFslIULE5Oe1Jid4CV7YVwS4VCD5Ze000dVbFC0iqk7JQcAaEY+3CeQCn36aGpYj+TFFfpz/sLV7+PQnd8RrVK/1Si69OCrEe6+3xhb5Solxs8A4INmJb0YMfBIR8w==

I think this will help you.

Thanks.
Hi Sumanthsv,

While your suggestion will produce acceptable result, it has unnecessary steps.
The use of cat is superfluous. AWK and sed can read from a file without the help of cat.
i.e.
Code:
awk -F ":" 'NR==1 {print $2}' testfile | sed 's/^ /

But also, AWK doesn't need the help of sed.
i.e.

Code:
 awk -F ":" 'NR==1 {sub("^ ", "", $2); print $2}' testfile

Pipes are great but not necessary here.

Still, AWK can do the job without that extra work of removing the blank in front, if we do:
Code:
awk 'NR==1 {print $4}' testfile

Keep up the good work!
Last edited by Aia; 05-23-2017 at 11:00 AM..
 

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