Try just having your first line in your input file have a <space> as the 1st character on the line and sort with the command:
Specifying a non-space field separator should make the leading space significant.
If you don't want a visible space at the start of the first line, make the first two characters in the file be a <space> character followed a <backspace> character.
infile:
z y x
c b a
desired output:
x y z
a b c
I don't want to sort the lines into this:
a b c
x y z
nor this:
c b a
z y x
The number of fields per line and number of lines is indeterminate. The field separator is always a space.
Thanks for the use of your collective brains.... (11 Replies)
Hi,
I want to delete a line in a file that contains a string. I tried:
grep -v "mystring" Myfile > Myfile
But this makes the Myfile empty. I read that I need to do something like:
grep -v "mystring" Myfile > Myfile.new
rm Myfile
mv Myfile.new Myfile
Is there a way to avoid creating a... (2 Replies)
Hello,
I have a text file that I need to sort the lines by date
record=5,French 9,2008-09-02T08:55:00,2008-09-02T10:00:00,2
record=79,Entrepreneurship 30,2008-09-17T11:00:00,2008-09-17T12:00:00,2
record=6,Computer Science 20,2008-09-02T09:55:00,2008-09-02T10:50:00,1... (5 Replies)
So, I have a file that has some duplicate lines. The file has a header line that I would like to keep at the top.
I could do this by extracting the header from the file, 'sort -u' the remaining lines, and recombine them. But they are quite big, so if there is a way to do it with a single... (1 Reply)
HI all
i have a text file file1 like this
004002004545454000001
041002004545222000002
006003008751525000003
007003008751352000004
006003008751142000005
004001005745745000006
i want to sort the file according to position 1-5 and secondary sort by
the last position of file 16-21... (4 Replies)
I am in need of keeping a title of a report and removing duplicates from a file like the one below. I will be using the `uniq –u` command for the removal of duplicate lines (let me know if there is a better way rather than the command `uniq`) but I need to keep the title (first 9 lines) of the... (2 Replies)
Hi all,
I have a file with 3 columns separated by space. Each column has a heading. I want to sort according to the values in the 2nd column (ascending order).
Ex.
Name rank direction
goory 0.05 --+
laby 0.0006 ---
namy 0.31 -+-
....etc.
Output should be
Name rank direction
laby... (3 Replies)
Hello,
I am looking to automate a task - which is updating an existing access control instruction of a server and making sure that the attributes defined in the instruction is in sorted order. The instructions will be of a specific syntax.
For example lets assume below listed is one of an... (6 Replies)
Discussion started by: sanjayroc
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)