To trim 3rd field in for all the lines of a file and replace the modified string in that particular field.
For example i have a file called Temp.txt having content
Temp.txt
-----------------
100,234,M1234
400,234,K1734
300,345,T3456
----------------
So the modified file output should... (4 Replies)
Hi Unix experts
I have simple text files in which the number of lines vary from one file to another. They look like the following:
#
#
.
.
34 46
76 72
39 68
I want to grab the first number of the last line of each file (let's say A= 39 in the above example), which is... (2 Replies)
I am trying to get text from a webpage, in terminal form. So far I am:
1. getting the html for the page printed using curl (curl -s webpage.com), which is then
2. piped to awk, printing line number 29 (awk NR==29), then
3. this is where I am sort of lost. I know where in the printed line I... (7 Replies)
Hello Everyone,
I am stuck with one issue while working on abstract flat file which i have to use as input and load data to table.
Input Data-
------ ------------------------ ---- -----------------
WFI001 Xxxxxx Control Work Item A Number of Records
------ ------------------------... (5 Replies)
Hi gurus,
I am trying to figure out how to extract substring from file line (all lines in file), as specified position and specified legth.
Example input (file lines)
dhaskjdsa dsadhkjsa dhsakjdsad hsadkjh
dsahjdksahdsad sahkjd sahdkjsahd sajkdh adhjsak
I want to extract substring on... (5 Replies)
Hello,
I have a file with a date field with various lengths. For example:
m/d/yyyy hh:mm or h:mm
mm/dd/yyyy hh:mm or h:mm
Is there a way using sed or awk to change the field to m/d/y ? I don't need the hours and minutes in that field, just the date in the proper format.
Thanks in... (6 Replies)
The awk below using the sample input would output the following: Basically, it averages the text in $5 that matches if $7 < 30 .
awk '{if(len==0){last=$5;total=$7;len=1;getline}if($5!=last){printf("%s\t%f\n", last,... (6 Replies)
The awk below produces the current output, which will add +1 to $3. However, I am trying to add the length of the matching characters between $5 and $6 to $3. I have tried using sub as a variable to store the length but am not able to do so correctly. I added comments to each line and the... (4 Replies)
Discussion started by: cmccabe
4 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)