Works great, thank you. I am currently learning python (or trying) and was going to use the awk as practice.... that is try rewriting it in python. Could I post back comments on each line to see if my thinking is correct? Thank you .
awk
/^#/ { print;next} # retains header as well
Last edited by cmccabe; 02-27-2019 at 02:18 PM..
Reason: commented awk
Hi,
I am using Bash shell to create some data and these data would be piped out to a file, let say output.txt.
This output.txt I would like to add some extra header information such as comments, descriptions and general information on the text.
I would like to know how could I maintain... (0 Replies)
Hello Friends,
I have got, this output below and i want to extract the name of symlink which is highlighted in red and the path above it highlighted in blue. At the end i want to append path and symlink.
/var/tmp/asirohi/jdk/jre
/var/tmp/asirohi/jdk/jre/.systemPrefs... (3 Replies)
Hi all,
I have space delimated file which look like this
1 2 3 4
5 6 7 8
9 1 0 11
I am using simple awk command to read the second column
awk '{print $2}' input_file
but i got the output like this which also read 10 from the third column
2
6... (8 Replies)
Hi,
Is there a way to write to a txt file each day but retain the header on the file? I'm cat'ing 5 files into one .txt file each day but I want the new data to be written after the first 2 lines which are:
Progname Size Date Owner
----------------------------
Basically I want my new... (4 Replies)
I have a file with very specific column spacing formatting,
I wish to do the following:
awk '{print $1, $2, $3, $4, $5, $6, $19-$7, $20-$8, $21-$9, $10, $11, $12}' merge.pdb > vector.pdb
but the format gets ruined.
I have tried with print -f but to no avail.... (7 Replies)
Hello There...
I have a sample input file ..
number:department:amount
125:Market:125.23
126:Hardware store:434.95
127:Video store:7.45
128:Book store:14.32
129:Gasolline:16.10
I will be doing some manipulations on all the records except the header, but the header should always be... (2 Replies)
I am trying to output all lines in a file where $7 is less than 30. The below code does create a result file, but with all lines in the original file. The original file is tab deliminated is that the problem? Thank you :).
awk 'BEGIN{FS=OFS=","} $7 < 30 {print}' file.txt > result.txt... (3 Replies)
In the awk below I am trying to print only the header lines starting with # or ## and the lines that $7 is PASS and AF= is less than 5%. The awk does execute but returns an empty file and I am not sure what I am doing wrong. Thank you.
file
... (0 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)