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Top Forums Shell Programming and Scripting To replace the value of the column in a fixed width file Post 302839793 by ginrkf on Saturday 3rd of August 2013 01:48:08 AM
Old 08-03-2013
Thanks a lot.Its working fine.

if possible can you please tell me how to replace only the header & trailer of the file rest of the records need to be the same

---------- Post updated 08-03-13 at 12:48 AM ---------- Previous update was 08-02-13 at 07:17 PM ----------

Code:
sed 's/\(.\{1\}\)../\1yyy/'

This command is actually replacing the value of all the records in the file.But I need to replace the value of header & trailer only .Please some one help here
 

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uuencode(4)						     Kernel Interfaces Manual						       uuencode(4)

NAME
uuencode - format of an encoded uuencode file DESCRIPTION
Files output by consist of a header line followed by a number of body lines, and a trailer line. The command ignores any lines preceding the header or following the trailer (see uuencode(1)). Lines preceding a header must not look like a header. The header line consists of the word followed by a space, a mode (in octal), another space, and a string which specifies the name of the remote file. The body consists of a number of lines, each containing 62 or fewer characters (including trailing new-line). These lines consist of a character count, followed by encoded characters, followed by a newline. The character count is a single printing character, which represents an integer. This integer is the number of bytes in the rest of the line, and always ranges from 0 to 63. The byte count can be determined by subtracting the equivalent octal value of an ASCII space charac- ter (octal 40) from the character. Groups of 3 bytes are stored in 4 characters, 6 bits per character. All are offset by a space to make the characters printable. The last line may be shorter than the normal 45 bytes. If the size is not a multiple of 3, this fact can be determined by the value of the count on the last line. Extra meaningless data will be included, if necessary, to make the character count a multiple of 4. The body is terminated by a line with a count of zero. This line consists of one ASCII space. The trailer line consists of the word on a line by itself. SEE ALSO
mail(1), uuencode(1), uucp(1). uuencode(4)
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