Please forgive this I think rather basic question.
I have been away from UNIX for a very long time and am in need of some help.
I need to be able to check for the existance of a specific file name say 'file.dat' in a particular location
If the file exists then run a second process (at... (2 Replies)
#!/bin/sh
count=0
for i in 2 4 6
do
echo "i is $i"
count='expr $count + 1'
done
echo "The loop was executed $count times"
with these scripts
my output is :
i is 2
i is 4
i is 6
The loop was executed expr $count + 1 times
What should I do to get the value instead of 'expr... (17 Replies)
Hi Experts,
I have a code like this.
=====
#include....
int main()
{
int count = 0;
while(1){
printf("\n Interation number is: %d \n ",count);
rv = system(" test.sh > log.txt " );
if (-1 == rv)
{
printf("Could not generate static log: error... (12 Replies)
Is there any FASTEST way to loop a script 10k times
my script works likes this
c-randomnumbers-script -i input1.bed -g g19 -e DB >> output1
I need to run this 10k times by using consecutive outputs to get my final output i.e, output10000
c-random-script -i input1.bed -g g19 -e DB >>... (5 Replies)
Hi
Am trying to print the PIDs of process in a file and trying to grep any PID from that file
I set the if condition as $value != "PID" and $value != "-"
Assign that number to a variable
Am confused since am using while loop to read the line from file
and again if condition to check those... (2 Replies)
Hi Fellows,
I was wondering how I can remove first few characters from multiple file names without do loop in unix?
e.g.
water123.xyz
water456.xyz
to
123.xyz
456.xyz
Thanks
Paul
Thanks. (3 Replies)
hi, i am running a java script on few thousand files (e1.rnk....en.rnk) but manually,. is there any way to run it automatically by changing the output directory (-out) ?
thanx in advance
ex:
java -jar commands -res /path/e1.rnk -out /path/e1 -gui false
java -jar commands -res /path/e2.rnk... (1 Reply)
hdr=$(cut -c1 $path$file|head -1)#extract header”H”
trl=$(cut -c|path$file|tail -1)#extract trailer “T”
SplitFile=$(cut -c 50-250 $path 1$newfile |sed'$/ *$//' head -1')# to trim white space and extract table name
If; then # start loop if it is a header
While read I #read file
Do... (4 Replies)
After the successful start of server, it should check the status again, if it is not running ,it should go through the loop for 2 times.
Even after two times of execution if still the server is not running it should send an alert email. Please help (1 Reply)
hi,
I am using hp unix server and not getting variable output present inside the while loop. I have tried changing the code and need to verify whether it is proper practice of code. I am expecting the output of varible RUN_FILE 3 to TRUE which i get inside the while loop.
RUN_FILE 1=TRUE... (8 Replies)
Discussion started by: gowthamsoft
8 Replies
LEARN ABOUT V7
diff
DIFF(1) General Commands Manual DIFF(1)NAME
diff - differential file comparator
SYNOPSIS
diff [ -efbh ] file1 file2
DESCRIPTION
Diff tells what lines must be changed in two files to bring them into agreement. If file1 (file2) is `-', the standard input is used. If
file1 (file2) is a directory, then a file in that directory whose file-name is the same as the file-name of file2 (file1) is used. The
normal output contains lines of these forms:
n1 a n3,n4
n1,n2 d n3
n1,n2 c n3,n4
These lines resemble ed commands to convert file1 into file2. The numbers after the letters pertain to file2. In fact, by exchanging `a'
for `d' and reading backward one may ascertain equally how to convert file2 into file1. As in ed, identical pairs where n1 = n2 or n3 = n4
are abbreviated as a single number.
Following each of these lines come all the lines that are affected in the first file flagged by `<', then all the lines that are affected
in the second file flagged by `>'.
The -b option causes trailing blanks (spaces and tabs) to be ignored and other strings of blanks to compare equal.
The -e option produces a script of a, c and d commands for the editor ed, which will recreate file2 from file1. The -f option produces a
similar script, not useful with ed, in the opposite order. In connection with -e, the following shell program may help maintain multiple
versions of a file. Only an ancestral file ($1) and a chain of version-to-version ed scripts ($2,$3,...) made by diff need be on hand. A
`latest version' appears on the standard output.
(shift; cat $*; echo '1,$p') | ed - $1
Except in rare circumstances, diff finds a smallest sufficient set of file differences.
Option -h does a fast, half-hearted job. It works only when changed stretches are short and well separated, but does work on files of
unlimited length. Options -e and -f are unavailable with -h.
FILES
/tmp/d?????
/usr/lib/diffh for -h
SEE ALSO cmp(1), comm(1), ed(1)DIAGNOSTICS
Exit status is 0 for no differences, 1 for some, 2 for trouble.
BUGS
Editing scripts produced under the -e or -f option are naive about creating lines consisting of a single `.'.
DIFF(1)