08-12-2007
Head and Tail in One Line
I am new to UNIX......I have one file which contains thousnads of records with header and tailer.
Header
Record 1
Record 2
....
....
Last Record
Trailer
I want to concatenate Header and Trailer in the first line....now the output should look like this:
Header: Header value, Trailer: Trailer Value
Record 1
Record 2
....
....
Last Record
I used this command to get the trailer from file:
tail -1 output_file
But not getting logic to further do.....can anybody pls complete this script.......thanks....
9 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
hai
in my shell script i want to replace the following commands
1) more
2) head
3) tail
i want to try all type of possible options avaliabul in the above commands
please help in implementing those commands (9 Replies)
Discussion started by: g_s_r_c
9 Replies
2. UNIX for Dummies Questions & Answers
I've a major file which includes other files and now I wanna 'cut' the file in several minor parts....like
....
find / -name "*.tmp" >filea
wc -l filea >fileb
sed -e '1s/ filea//' fileb >filec
AMOUNT=`cat filec`
if ; then
cat file a |head -100l (ell) |tail -100l >filec
cat file a |head... (6 Replies)
Discussion started by: svennie
6 Replies
3. Shell Programming and Scripting
Hi,
I have been given assignment of 30 scripts out of which I was able to solve many, I need help with few out of which one asks to imitate head and tail command of unix without using the head and tail commands. Problem is stated below:
Write an interactive shell script to imitate the head... (5 Replies)
Discussion started by: nutalk
5 Replies
4. Shell Programming and Scripting
Hi, I only have a very limited understanding and experience with writing code and I was hoping I could get some help.
I have a dataset of two columns (txt format, numbers in each row separated by a tab)
Eg.
1 5
2 5
3 6
4 7
5 6
6 6
7 ... (5 Replies)
Discussion started by: Emred_Skye
5 Replies
5. Shell Programming and Scripting
Hi,
As part of our project, we need to load historical data for a year before our system is live. We have the data feed files that we need to load. However, I need to make sure that the file structure (number of fields separated by a comma) on the field is same for all the files of the same... (1 Reply)
Discussion started by: raj.jha
1 Replies
6. UNIX for Dummies Questions & Answers
hay i need to display middle line:
1
2
3
4
5
how can i display 3-4? (6 Replies)
Discussion started by: margan_ron
6 Replies
7. Homework & Coursework Questions
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
view the 7th line of the program xxx.sh
2. Relevant commands, code, scripts, algorithms:
head command tail... (10 Replies)
Discussion started by: hbell221
10 Replies
8. UNIX for Dummies Questions & Answers
Hi All,
I am new to unix.
In this forum some days back, I have read something like below:
1) Do not use perl if awk can do your work.
2) Do not use awk if sed can do your work.
.
.
.
I do not re-collect the whole thing. I think it is good to know the precedence of using these... (2 Replies)
Discussion started by: Prathmesh
2 Replies
9. Homework & Coursework Questions
First month learning about the Linux terminal and it has been a challenge yet fun so far. We're learning by using a gameshell. I'm trying to display a certain line ( only allowed 1 command ) from a file only using the head or tail. I'm pretty about this answer:
head -23 history.txt | tail -1... (1 Reply)
Discussion started by: forzatekk
1 Replies
LEARN ABOUT DEBIAN
srec_stewie
srec_stewie(5) File Formats Manual srec_stewie(5)
NAME
srec_stewie - Stewie's binary file format
DESCRIPTION
If you have a URL for documentation of this format, please let me know.
Any resemblance to the Motorola S-Record is superficial, and extends only to the data records. The header records and termination records
are completely different. None of the other Motorola S-Records record type are available.
The Records
All records start with an ASCII capital S character, value 0x53, followed by a type specifier byte. All records consist of binary bytes.
The Header Record
Each file starts with a fixed four byte header record.
+-----+------+------+------+
|0x53 | 0x30 | 0x30 | 0x33 |
+-----+------+------+------+
The Data Records
Each data record consists of 5 fields. These are the type field, length field, address field, data field, and the checksum. The lines
always start with a capital S character.
+-----+------+---------------+---------+------+----------+
|0x53 | Type | Record Length | Address | Data | Checksum |
+-----+------+---------------+---------+------+----------+
Type The type field is a one byte field that specifies whether the record has a two-byte address field (0x31), a three-byte address
field (0x32) or a four-byte address field (0x33). The address is big-endian.
Record Length
The record length field is a one byte field that specifies the number of bytes in the record following this byte.
Address This is a 2-, 3- or 4-byte address that specifies where the data in the record is to be loaded into memory.
Data The data field contains the executable code, memory-loadable data or descriptive information to be transferred.
Checksum
The checksum is a one byte field that represents the least significant byte of the one's complement of the sum of the values repre-
sented by the bytes making up the record's length, address, and data fields.
The Termination Record
Each file ends with a fixed two byte termination record.
+-----+------+
|0x53 | 0x38 |
+-----+------+
Size Multiplier
In general, binary data will expand in sized by approximately 1.2 times when represented with this format.
EXAMPLE
Here is an hex-dump example file. It contains the data "Hello, World[rq] to be loaded at address 0.
0000: 53 30 30 33 53 31 10 00 00 48 65 6C 6C 6F 2C 20 S003S1...Hello,
0010: 57 6F 72 6C 64 0A 9D 53 38 World..S8
COPYRIGHT
srec_cat version 1.58
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Peter Miller
The srec_cat program comes with ABSOLUTELY NO WARRANTY; for details use the 'srec_cat -VERSion License' command. This is free software and
you are welcome to redistribute it under certain conditions; for details use the 'srec_cat -VERSion License' command.
AUTHOR
Peter Miller E-Mail: pmiller@opensource.org.au
//* WWW: http://miller.emu.id.au/pmiller/
Reference Manual SRecord srec_stewie(5)