That subject might sound weird. What I have is two files. One looks like:
The other looks like:
I would like to be able to remove the contents of the second file from the first file, giving, for example, this:
The first file's contents are always changing, the second file's contents are derived from the first using sort -uk1,1. It might make more sense if I put it all in context. I am trying to make a script (cron job) that checks to see how many duplicate sessions there are for users, and then kill the oldest duplicates while keeping the newest one alive. I know this is possible, in my experience with Unix (and this board) anything is possible. Can somebody tell me how I can do this file operation?
Thank you
...
i have 4 files to concatenate but in a certain order and i wanted to do it in a shorter one line command , if possible !
4 files : file , file0 , file1 and file2
file1 into file2
file0 into the result
file into the result
thanks in advance
Christian (1 Reply)
I'm trying to concatenate records from 2 files and output it to a third file. The problem I'm running into is that it seems like the "While" command is limited to processing one file at a time. It seems like you could read a record from file1 into a variable. Then do the same for the for file2.... (4 Replies)
HI
I need to concatenate two files which are having headers. the result file should contain only the header from first file only and the header in second file have to be skipped.
file1:
name age
sriram 23
file2
name age
prabu 25
result file should be
name age
sriram 23
prabu ... (6 Replies)
Hi,
I have 30 text files on UNIX that I need to concatenate and create one big file. Could anyone provide me with a solution (if one exist)? I need the answer asap (today). Thanks a lot.
Denis (5 Replies)
Hi,
I am new in unix.
I have below requirement:
I have two files at the same directory location
File1.txt and File2.txt (just an example, real scenario we might have File2 and File3 OR File6 and File7....)
File1.txt has :
header1
record1
trailer1
File2.txt has:
header2
record2... (4 Replies)
I have 3 files
File1
C1 C2 c3
File 2
C1 c2 c3
File 3
C1 c2 c3
Now i want to have
File1 as C1 c2 c3 I
File2 as C1 c2 c3 O
File3 as c1 c2 c3 D
and these 3 files should be concatenated into a single file
how can it be done in unix script? (3 Replies)
Firstly one of my mysql queries will yeild following output
+-------+---------------------+-------------------+----------------------------------------------------------------------------+
| ID | PLATFORM | SORT_NAME | DESCRIPTION ... (2 Replies)
Hello All Unix Users,
I am still new to Unix, however I am eager to learn it..
I have 2 files, some lines have some matching substrings, I would like to concatenate these lines into one lines, leaving other untouched. Here below is an example for that..
File 1 (fasta file):
>292183... (6 Replies)