Visit The New, Modern Unix Linux Community


How to insert some constant text at beginig of each line within a text file.


 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting How to insert some constant text at beginig of each line within a text file.
# 1  
Data How to insert some constant text at beginig of each line within a text file.

Dear Folks Smilie,

I am new to UNIX scripting and I do not know how can I insert some text in the first column of a UNIX text file at command promtp.
I can do this in vi editor by using this command :g/^/s//BBB_

e,g I have a file named as Test.dat and it containins below text:

michal
David
Lisa
Antonio

Now I want to insert BBB at the beging of every line and out put should look like belwo:

BBB_michal
BBB_David
BBB_Lisa
BBB_Antonio

Is there are way by using sed, awk or any other command I can get the above out put file. I want to run this command at UNIX command prompt.

Please advice & your feed back is highly appreciated.

Many thanks

Kind Regards

M.Afzal
# 2  
yes, if your file is line sequential file
you can use awk
awk ' { print "BBB_" $0 } ' yourfilename > outputfilename
# 3  
Dear Paresh,

You command works very fine, its perfect and you are really intelligent.

Many thanks,

Kind Regards,

Muhammad Afzal
# 4  
Alternative...

Code:
(04:35:36\[ddeco***@S.ManDNCS)
[~]$ cat test
michal
David
Lisa
Antonio

(04:35:36\[ddeco***@S.ManDNCS)
[~]$  sed 's/^/BBB_/g' test
BBB_michal
BBB_David
BBB_Lisa
BBB_Antonio

PS: Whats up fellow (former) DTVer
# 5  
Code:
sed 's/^/BBC_/' file


Previous Thread | Next Thread
Thread Tools Search this Thread
Search this Thread:
Advanced Search

Test Your Knowledge in Computers #663
Difficulty: Medium
American computer programmer Timothy Paterson wrote the original operating system for the Intel 8086 microprocessor in 1980, initially calling it QDOS (Quick and Dirty Operating System).
True or False?

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Insert a line of text on nth line of a file

Hi All, I am using UNix Sun OS sun4u sparc SUNW,SPARC-Enterprise My intention is to insert a line of text after 13th line of every file inside a particular directory. While trying to do it for a single file , i am using sed sed '3 i this is the 4th line' filename sed: command garbled: 3... (5 Replies)
Discussion started by: gotamp
5 Replies

2. Shell Programming and Scripting

How to read a text file line by line and insert into a database table?

I have a test file that I want to read and insert only certain lines into the the table based on a filter. 1. Rread the log file 12 Hours back Getdate() -12 Hours 2. Extract the following information on for lines that say "DUMP is complete" A. Date B. Database Name C.... (2 Replies)
Discussion started by: JolietJake
2 Replies

3. UNIX for Dummies Questions & Answers

Insert a line in a text file

I want to insert a line with text after the 9th line of a text file. How would I do this using sed or awk? (2 Replies)
Discussion started by: lost.identity
2 Replies

4. Shell Programming and Scripting

Need to insert text(constant) at the beginning of file

I am very new to scripting and I know this request is simple but I am having no luck with it. I have a file a.dat with the following data in it. aa bb cc dd I need to run a script that will take each line of a.dat and put dsjc/ubin/ in front of each record, so the output looks like ... (2 Replies)
Discussion started by: jclanc8
2 Replies

5. UNIX for Dummies Questions & Answers

Insert a line in a sorted text file(s)

Hello, I am trying to add a line (usually just a word) to some text files in a directory that are already sorted. I just don't want to run the sort command again because it can take a long time when the text or log files are really huge. I have a bashscript that will take in the 1st argument... (7 Replies)
Discussion started by: raptor25
7 Replies

6. Shell Programming and Scripting

Using sed to insert text file at first line

sed '1r file.txt' <source.txt >desti.txt This example will insert 'file.txt' between line 1 and 2 of source.txt. sed '0r file.txt' <source.txt >desti.txt gives an error message. Does anyone know how 'sed' can insert 'file.txt' before the first line of source.txt? (18 Replies)
Discussion started by: psve
18 Replies

7. Shell Programming and Scripting

How to insert string at particular 4th line in text file

I just want to add a particular string in text file using shell script text file format 1 columns-10 2 text=89 3 no<> 4 5 test-9876 6 size=9 string need to insert in 4th line <switch IP='158.195.2.567' port='5900' user='testc' password='asdfrp' Code='8'> After inserting the... (8 Replies)
Discussion started by: puneet.goel
8 Replies

8. Shell Programming and Scripting

Insert a line in a text file

So I need to write lines into line X of file X. I can get the file by doing: cfgnumber=$(cat -n -comm.cfg| grep -i "servicegroup_name 24x7-comunicacions") echo $cfgnumber it outputs the Line where it finds now I need to start writing something right bellow that line. thanks (10 Replies)
Discussion started by: 4scriptmoni
10 Replies

9. Shell Programming and Scripting

how to insert a extra line in a text file

how to insert a extra line in a text file using a sh command iam trying to think of a way to add a extra line but without deleting the whole text do anyone have any ideas (2 Replies)
Discussion started by: bhaviknp
2 Replies

10. Shell Programming and Scripting

Insert text file at a certain line.

I need to insert a file called temp_impact (which has about 15 lines in it) to a file called 11.23cfg starting at line 33. I searched the forums and found the sed '34i\ test' 11.23cfg > newfile That will enter word test at the appropriate line, but i need the entire file dumped there. Any... (4 Replies)
Discussion started by: insania
4 Replies

Featured Tech Videos