hi guys..
i have a shell script that loops through a certain directory to see if a file has been created and then prints the file if it exists...
the only problem i have now is that sometimes the flat does not get created by the program thats supposed to create it, in this scenario, my loop... (1 Reply)
Hi all. I am trying to execute a while loop that reads a log file containing a file listing, and it compares file sizes, etc.
But I am getting an error that makes it seem like it is not reading the log file line by line. When I do a 'more' on the log file, it doesn't appear to be wrapped...
... (1 Reply)
hi,
can any one suggest why the program 2 is not working.
only difference is
for ab in *.txt
for ab in a_DATA.txt b_DATA.txt c_DATA.txt
------------------------------------
Program :1 (working fine)
#!/bin/ksh
for ab in a_DATA.txt b_DATA.txt c_DATA.txt
suf="_"
echo "old->... (1 Reply)
This is the content of a file work.log
1 TGBUS I-US 0;15;83
i did this
for i in `cat work.log`
do
echo $i
done
I wanted the out put to be
1 TGBUS I-US 0;15;83
But the output appears as
1
TGBUS
I-US
0;15;83
For Loop treats space as a delimiter. Can i overrride this space as... (10 Replies)
Hi,
I have the following script which is two while loops, but it is working only for the Inner loop without going back to the outer loop.
the aim of this script is to remove data files from memory after each five times for each setting of the rotate parameter
#!/bin/csh
set hdir =... (1 Reply)
Hi,
I have a command that I want to translate to Unix. I mostly work with Windows and because of that I am stuck on a part.
What I cannot find on the internet is skipping the first lines in a for loop and using a certain word/token. (I know how to do a normal loop with output)
I need to skip... (1 Reply)
Hi,
I need to reset root password on multiple servers, need to do it from my Jump server, so I'm plannin to use for loop.
Can someone pleaz suggest me how to do this...?
For example, I check the uptime of a server from my jump box,
===========================================
for i in... (1 Reply)
Dear all,
I have a question regarding unix loops. I want to run 100 commands using file1.txt-file100.txt in parallel. I use the code below and it works well. But now I want to run first 20 commands first using file1.txt-file20.txt in parallel, then when they are completed, run the next 20... (4 Replies)
I have a table in oracle which has 2 columns
table_name table_name1
U1 T1
U2 T2
I have to take these as a variable in unix and then go to /home/bin and execute a unix command using these variables.
Considering that there is only one row in the table I was able to write the below but need help... (2 Replies)
Discussion started by: Ashcalin
2 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)