Hi ,
I am having one situation in which I need to run some simple unix commands after doing "chroot" command in a shell script. Which in turn creates a new shell.
So scenario is that
- I need to have one shell script which is ran as a part of crontab
- in this shell script I need to do a... (2 Replies)
Hi,
In sed, is it possible to match patterns by directly executing UNIX commands inside sed?
For e.g. -
sed "s/`cat file.txt | cut -d "|" -f2`/replace_string"
Will the above command work?
My expectation is to search for the second field in file.txt (file delimited by | ) and replace... (10 Replies)
Dears,
I'm new in shell scripting and i need your help, i would like to know how can i create a script to ftp to a certain unix/linux machine/server IP address and get a file for example without user intervention? How can i force the script to use a certain username and password to access this... (4 Replies)
I have a reqirement to serialise various rsh scripts that hit my server from an external scheduler. No matter how many scripts come via rsh, only one should execute at a time and others should wait.
I have made the scheduler make a request to my shell script with the command to be run as a... (4 Replies)
Hi all,
I am using the below given sqlplus command in my unix script to invoke a stored procedure which returns a value .It works fine.
RET_CODE=$(/opt/oracle/product/10.2.0.4.CL/bin/sqlplus -S $USER/$PASSWD@$DB_NAME <<EOF
EXEC MY_PKG.MY_SP (:COUNT);
PRINT COUNT;
commit;
... (6 Replies)
Hi Folks,
I have a text file which may or may not have any data.
I would like to email the file, via a Korn shell script, if the file is not empty.
I am fiddling around with the wc -l command, but no luck so far. The pseudo code is as follows
count=`wc -l test.txt`
if
cat test.txt... (4 Replies)
Hi,
does any one know the environmental parameter that I have to set so as to make sure the file operations run properly within the script.
right now when I am doing a cat from within the script nothing happens, same is the case when I do a grep. when I am doing awk '{print $0 }' its printing... (1 Reply)
Hello
I'm trying to write simple script to delete archive logs for RMAN, unfortunately it's not working, I tried two way to do that:
#!/bin/ksh
echo "Start ....."
rman target=/ << EOF
RUN {
delete force noprompt archivelog until time 'sysdate-10';
}
EXIT;
EOF
echo "END ..."
echo... (6 Replies)
Hi,
I wrote a simple script, which will call other scripts or run commands on a UNIX server. my script has multiple steps/commands with some delay in between.
I usually get some email notifications after the successful execution of each step.
**My intention is to get email alerts when it is... (5 Replies)
Hi
I have a program
int main(int srgc, char *argv)
{
for(int i=1; i<50; i++)
{
system("dd if=/dev/zero of=file$i bs=1024 count=$i");
}
return 0;
}
My doubt is how to use the "$i" value inside C code
Please help (2 Replies)
Discussion started by: Priya Amaresh
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)