I have a template that I usually use to generate stats on an hourly basis for a number of cell sites altogether. I would like to be able to write a script that would go to the template and extract the information for any single site at any time during the day. For example, let's say that my... (4 Replies)
Dear friends,
I'm a novice Unix user and I'm trying to learn the ropes. I have a big task I have to accomplish and I'm convinced Unix can get the job done, I just haven't figured out how. I recently posted on the topic of cutting text between unique text patterns and somebody helped me a great... (24 Replies)
Hi Jean
I require your help in writing a shell script. Iam zero in Unix programming. I have a large file about 400 MB of data, which contains about 50000 XML messages seperated by a Tab, I think. I need to extract only 4 values from each XML message and write it onto a new file. Please help me... (2 Replies)
Hi All,
I have several .gz files and i need to see the contents of these file, without extracting these file. If i extract these file the space will be full so. I need to see the contents and parse the contents to a script to extract data from these.
Please let me know if you need any more... (10 Replies)
Hi,
I want to delete the contents of a file which are matching with contents of other file in shell scripting.
Ex.
file1
sheel,sumit,1,2,3,4,5,6,7,8
sumit,rana,2,3,4,5,6,7,8,9
grade,pass,2,3,4,5,6,232,1,1
name,sur,33,1,4,12,3,5,6,8
sheel,pass,2,3,4,5,6,232,1,1
File2... (3 Replies)
Hi
I am trying to extract information out of a file but keep getting grep cant open errors
the code is below:
#bash
#extract orders with blank address details
#
# obtain the current date
# set today to the current date ccyymmdd format
today=`date +%c%m%d | cut -c24-31`
echo... (8 Replies)
Hello there,
I am trying to extract (string) information ( a list words) from 4 files and then put the results into 1 file. Currently I am doing this using grep -f list.txt file1 . and repeat the process for the other 3 files. The reasons i am doing that (a) I do know how to code (b) each file... (4 Replies)
Hi there!
Well, I'm writing a script to obtain certain information about files. Specifically, I want to get the information about those files which last access were in the last 24 hours, so I'm doing something like this:
find <directory_name> -atime -1 -printf '%f %a\n'
I would also... (4 Replies)
I want to write a script that extracts a value from a line of text. I know it can be done using awk but I've never used awk before so I don't know how to do it. The text is:
Mem: 100M Active, 2150K Cache, 500M Buf, 10G Free
I want to extract the free memory value to use as a variable. In... (5 Replies)
Discussion started by: millsy5
5 Replies
LEARN ABOUT 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 /adm/users | join -t: -a 1 -e "" - bdays
Add birthdays to password information, leaving unknown birthdays empty. The layout of is given in users(6); bdays contains sorted
lines like
tr : ' ' </adm/users | 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
/sys/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)