The command
opens up a pipe to a sort command (if a sort command isn't already running) and writes the current input line to it.
The command
closes the pipe and flushes the output from the sort command to standard output.
This is done whenever a pipe to sort is open and either a line starting with "#" is found or the end of the input is found.
So, any line starting with "#" is written directly to standard output by the awk script and any set of lines between lines starting with "#" are piped through sort before being written to standard output.
This User Gave Thanks to Don Cragun For This Post:
Hi,
I have my input as follows :
I have given two entries-
From system Mon Aug 1 23:52:47 2005
Source !100000006!:
Impact !100000005!: High
Status ! 7!: New
Last Name+!100000001!:
First Name+ !100000003!:
... (4 Replies)
hi experts(novice people can stay away as it is no child's game),
i am developing a script which works like recycle bin of windows.
the problem i am facing is that when ever i am trying to delete a file which is situated in parent directory or parent's parent directory i am unable to capture... (1 Reply)
hi experts(novice people can stay away as it is no child's game),
i am developing a script which works like recycle bin of windows.
the problem i am facing is that when ever i am trying to delete a file which is situated in parent directory or parent's parent directory i am unable to capture... (5 Replies)
Discussion started by: yahoo!
5 Replies
4. Post Here to Contact Site Administrators and Moderators
Where can I download the VTC - Unix Shell Scripting Advanced complete video.
I don't know in which thread I should post this question.Plz help me out, or just tell me the link in the reply to this post.
Thanks in advance. (0 Replies)
Hi,
I'm unable to sort the files with the required names on Unix. Details have been enclosed:-
Below are the fle name inside a folder, now i need to sort them in a way that they are group with the seconds occurance in the file name (E.g 01954,07947,06794)
01.01954.MXRS1.rcv... (3 Replies)
Hi ,
I have a file myhost.txt which contains below,
127.0.0.1 localhost
1.17.1.5 atrpx958
11.17.10.11 atrpx958zone nsybhost
I need to append words only after "atrpx958" like 'myhost' and 'libhost' and not after atrpx958zone.
How to search the word atrpx958(which is hostname) only,... (5 Replies)
Suppose I have a file which contains other file names with some extention .
text file containt
gdsds sd8ef g/f/temp_temp.sum yyeta t/unix.sum
ghfp hrwer h/y/test.text.dat
if then....
I want to get the complete file names, like for above file I should get output as
temp_temp.sum... (4 Replies)
Hi ladies and gentleman.. I have two text file with me. I need to replace one of the file content to another file if one both files have a matching pattern.
Example:
text1.txt:
ABCD 1234567,HELLO_WORLDA,HELLO_WORLDB
DCBA 3456789,HELLO_WORLDE,HELLO_WORLDF
text2.txt:
XXXX,ABCD... (25 Replies)
I have input data looks like this which is a part of a csv file
7,1265,76548,"0102:04"
8,1266,76545,"0112:04"
I need to make the output data should look like this and the output data will be part of text file:
7|1265000 |7654899 |A|
8|12660000 |76545999 |B|
The logic behind the... (6 Replies)
Discussion started by: RJG
6 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)