It's highly dangerous to mess around with system files (e.g. password files) NOT using the tools designed for it. You might end up not being able to access the system.
For the sheer exercise: How is the user identified - by user name (field 1), UID (field 3), or both? And, it's just about field 2, so all the other fields in file 2 will stay the same? Assuming both, why don't you copy the entire line?
Try
I have 2 files - fileA and fileB
I need to match the first field of the 2 files then output some of the fields from fileA on the same line as certain fields from fileB.
There will be instances where fileB does not have a match for first field in fileA
Thanks in advance (8 Replies)
I want to count the number of occurence of perticular word from one text file.
Please tell me "less" command is work in ksh or not. If it is not working then instead of that which command will work. :confused: (40 Replies)
Hi,
We need to configure some of the fileds in bugzilla like Platform,OS, Version etc are mandatory. Is it possible to set, if yes then how to configure.
Thanks & Regards,
Bache (0 Replies)
Hi all,
I am new to UNIX, so sorry if my question seem stupid to u.
well i want to replace the first character of first 30 lines of a file, only if the first character is h.
and
in anothe script i want to replace a particular string/character say hello/h of a file.Condition: It should... (1 Reply)
Hi Friends,
Please help me in finding the solution for this :
I have a file as below :
CuDv:
name = "hdisk0"
status = 1
chgstatus = 2
ddins = "scsidisk"
location = ""
parent = "vscsi0"
connwhere = "830000000000"
PdDvLn... (3 Replies)
Dear All,
I need a unix script that will read the 7th line and especially these fileds from a file Mo speed 16, Mt speed 15 every 15 minutes starting from 00:00 to 23:45 on daily basis and put the result in a txt file and name it MT_MO_20090225.txt, please also note that the system date format... (2 Replies)
I have following text:
NAME=ora.LISTENER.lsnr
TYPE=ora.listener.type
TARGET=ONLINE , ONLINE , ONLINE , ONLINE
STATE=ONLINE on host1, ONLINE on host2, ONLINE on host3, ONLINE on host4
NAME=ora.LISTENER_1525.lsnr
TYPE=ora.listener.type
TARGET=ONLINE ... (2 Replies)
Dear All
I have a text file which has many columns (>10,000). I want to create a new text file which will NOT include following columns: 5,15,105,200. How can I do that in shell (or awk, perl)? Thanks. (6 Replies)
How to list todays file in perticular folder
Moved thread to appropriate forum (9 Replies)
Discussion started by: pspriyanka
9 Replies
LEARN ABOUT BSD
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 file1 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.
Fields are normally separated by blank, tab or newline. In this case, multiple separators count as one, and leading separators are dis-
carded.
These options are recognized:
-an In addition to the normal output, produce a line for each unpairable line in file n, where n is 1 or 2.
-e s Replace empty output fields by string s.
-jn m Join on the mth field of file n. If n is missing, use the mth field in each file.
-o list
Each output line comprises the fields specified in list, each element of which has the form n.m, where n is a file number and m is a
field number.
-tc Use character c as a separator (tab character). Every appearance of c in a line is significant.
SEE ALSO sort(1), comm(1), awk(1)BUGS
With default field separation, the collating sequence is that of sort -b; with -t, the sequence is that of a plain sort.
The conventions of join, sort, comm, uniq, look and awk(1) are wildly incongruous.
7th Edition April 29, 1985 JOIN(1)