I'm sure this will be an easy question for you experts out there, but I have been searching the forum and working on this for a couple hours now and can't get it right.
I have a very messy data file that I am trying to tidy up - one of the issues is some records are split into multiple lines: ... (4 Replies)
Hi,
I'm trying to remove multiple lines of text based off a series of different words and output it to a new file
The document contains a ton of data but i want to delete any line that has the following
mx1.rr.biz.com or ns2.ri.biz.com
i tried using grep -v filename "mx1.rr.biz.com" >... (3 Replies)
I have a very large file (10,000,000 lines), that contains a sample id and a property of that sample. I have another file that contains around 1,000,000 lines with sample ids that I want to remove from the original file (create a new file without these lines).
I know how to do this in Perl, but it... (9 Replies)
Well here goes:
I tried to write a batch file that adds a specific fixed text to each line of an already existing text file.
for the adding text infront of each line I tried this:
for /F "delims=" %%j in (list.txt) do echo.STARTTEXT\%%j >> list.txt
for adding text after each line I... (0 Replies)
It is very simple to remove a hyphen from a word anywhere in that word using a simple sed command (sed -i 's/-//g' filename), but I am not able to figure out how to do this:
For example,
apple
-orange
tree
pipe-
banana-shake
dupe-
What my output should look like:
apple
orange
tree... (1 Reply)
My file has the entries like below...
/dev/sds
/dev/sdak
/dev/sdbc
/dev/sdbu
I want to make the file like below
echo 1 > /sys/block/sds/device/rescan
echo 1 > /sys/block/sdak/device/rescan
echo 1 > /sys/block/sdbc/device/rescan
echo 1 > /sys/block/sdbu/device/rescan (2 Replies)
Greetings.
I've got a csv file with data along these lines:
Spumoni's Pizza Place, Placemats n Things, Just Lamps
Counterfeit Dollars by Vinnie, Just Shades, Dollar StoreI want to replace the entire comma-delimited field if it matches something ending in "Place" or beginning with "Dollar",... (2 Replies)
Hi,
I have been searching how to do this but I can't seem to find how to do it. Hopefully someone can help.
I have multiplr files, 100's example 12345-zxys.213423.zyz.txt. I want to be able to take all these files and remove the first '12345-' from each of the files. '12345-' these characters... (5 Replies)
Hi, I need to print lines which are matching with start pattern "SELECT" and END PATTERN ";" and only select the last "select" statement including the ";" .
I have attached sample input file and the desired input should be as:
INPUT FORMAT:
SELECT
ABCD,
DEFGH,
DFGHJ,
JKLMN,
AXCVB,... (5 Replies)
Discussion started by: nani2019
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)