How about our good ole ex utility... ---------- Post updated at 12:01 PM ---------- Previous update was at 11:57 AM ----------
Quote:
Originally Posted by Don Cragun
You can use awk, cat, ed, ex, sed (with or without -i), or lots of other methods. All of them are going to use a temp file to prepend data into an existing file. Some of them will make the temp file obvious; others will use the temp file under the covers.
AFAIK ed and ex would use an internal buffer instead of a temporary file...
say i have these many file in a directory named exam.
1)/exam/newfolder/link.txt.
2)/exam/newfolder1/
and i create a tar say exam.tar
well the problem is,
when i read the tar file i dont find any metadata about the directories,as you cannot create a tar containig empty directories.
on the... (2 Replies)
Dear all,
I have a file created in the name sample.txt in UNIX with header and footer. How to insert a required string (for example "FILE1") in the header part after the file has been created. What kind of command can i use to do the same.
Thanks in advance
Hari (3 Replies)
Hi All,
I have several txt files i need to enter specific header and footer (both are separate) to all these files how can i do this? plz help..
Regards,
Raghav (4 Replies)
Hi;
I've been searching posts to find a solution to what I'm trying to do, but I've have NOT found anything yet.
I have a file (file1) with 300K columns and 1411 rows, the columns don't have a column no. header (No header at all) and I'm trying to fetch the information from specific columns.... (3 Replies)
Hi Experts,
In our project we have requirement where in we have to compare header of one file with header in the parameter file.
There are 20 files which we ftp from one site. All this files have different header.
We are comapring this file with our parameter file(which is having the header... (2 Replies)
Friends,
I need help with the following in UNIX.
Merge all csv files in one folder considering only 1 header row and ignoring header of all other files.
FYI - All files are in same format and contains same headers.
Thank you (4 Replies)
Hi Experts,
I have a file which contain hundreds of records/lines. I want to insert the below header in the file after every 60 lines.
#Header
FirstName LastName Address
--------- ---------- ---------
Let say I saved the... (6 Replies)
I would like to hear your directions on how to Insert theses tag </TITLE> and <TEXT> at a given position in 1000 of text files.
My Files look like as
samplefile1.txt
<DOC>
<DOCNO>3_September_2012</DOCNO>
<TITLE>
... ... ... .... ... .. .. .. ... .. .. ....
</TITLE>
<TEXT>
.... (1 Reply)
Hi,
I am trying to insert header row with a special character delimiter with Unicode u0109 into a file with ‘echo’, header looks like below
echo –e “header1\u0109header\u0109header3\u0109header4”
It just inserting as it is in the quotes but not the special character, Please suggest if am... (2 Replies)
I've been struggling with this one for quite a while and cannot seem to find a solution for this find/replace scenario. Perhaps I'm getting rusty.
I have a file that contains a number of metrics (exactly 3 fields per line) from a few appliances that are collected in parallel. To identify the... (3 Replies)
Discussion started by: verdepollo
3 Replies
LEARN ABOUT DEBIAN
plan9-join
JOIN(1) General Commands Manual JOIN(1)NAME
join - relational database operator
SYNOPSIS
join [ options ] file1 file2
DESCRIPTION
Join forms, on the standard output, a join of the two relations specified by the lines of file1 and file2. If one of the file names is the
standard input is used.
File1 and file2 must be sorted in increasing ASCII collating sequence on the fields on which they are to be joined, normally the first in
each line.
There is one line in the output for each pair of lines in file1 and file2 that have identical join fields. The output line normally con-
sists of the common field, then the rest of the line from file1, then the rest of the line from file2.
Input fields are normally separated spaces or tabs; output fields by space. In this case, multiple separators count as one, and leading
separators are discarded.
The following options are recognized, with POSIX syntax.
-a n In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2.
-v n Like -a, omitting output for paired lines.
-e s Replace empty output fields by string s.
-1 m
-2 m Join on the mth field of file1 or file2.
-jn m Archaic equivalent for -n m.
-ofields
Each output line comprises the designated fields. The comma-separated field designators are either 0, meaning the join field, or
have the form n.m, where n is a file number and m is a field number. Archaic usage allows separate arguments for field designators.
-tc Use character c as the only separator (tab character) on input and output. Every appearance of c in a line is significant.
EXAMPLES
sort /etc/passwd | join -t: -1 1 -a 1 -e "" - bdays
Add birthdays to the /etc/passwd file, leaving unknown birthdays empty. The layout of /adm/users is given in passwd(5); bdays con-
tains sorted lines like
tr : ' ' </etc/passwd | sort -k 3 3 >temp
join -1 3 -2 3 -o 1.1,2.1 temp temp | awk '$1 < $2'
Print all pairs of users with identical userids.
SOURCE
/src/cmd/join.c
SEE ALSO sort(1), comm(1), awk(1)BUGS
With default field separation, the collating sequence is that of sort -b -ky,y; with -t, the sequence is that of sort -tx -ky,y.
One of the files must be randomly accessible.
JOIN(1)