The note about the $ was just generally.
In your code, you test the variable var to match the reg exp. Since var is not defined, it can never match. So the command inside the curly brackets (print) will never be executed.
In my example you could for further use store the length into a variable like this:
Hello Everybody,
Does anyone know what the @ symbol means in a csh script, if used with a variable assignment as below
@ line = 1
why not just use....
set line=1
Many thanks
rkap (1 Reply)
Hi,
I am having a problem with assigning a value to a variable. The empname is looked for in the employees file and I am trying to assign it to the jobnum variable in the following statement
jobnum= cat/etc/employees | grep $empname | cut -d : -f 5
It is getting the right answer but it is... (3 Replies)
Hi,
i have an issue with eval and variable assignment.
1) i have a date value in a variable and that date is part of a filename,
var1=20100331
file1=${var1}-D1-0092.xml.zip
file2=${var2}-D2-0092.xml.zip
file3=${var3}-D3-0092.xml.zip
i am passing the above variables to a script via... (11 Replies)
Hi
I have variable A_B=alpha
also var1="A"
var2="B"
I want to retrieve the value alpha using var1 and var2 , somthing like
echo ${${var1}_${var2}} that works. Obviously this is receiving syntax
error (6 Replies)
Hi all,
I’m very new to UNIX programming. I have a question on dynamic variable
1. I’m having delimited file (only one row). First of all, I want to count number of columns based on delimiter. Then I want to create number of variables equal to number of fields.
Say number of... (5 Replies)
Hi,
In AIX I have a variable with , (coma) separated values assigned to it like shown below
var1=apple,boy,chris
i want to convert this to
var1='apple','boy','chris'
the number of values assigned to var1 might change and it could be from 1 to n
any suggestions please? (3 Replies)
pattern1=book
{
x=1
eval echo \$pattern$x
}
book (this is the output)
But when I assign a variable to the output of the eval it doesn't work unless I prefix 2 times backslash before $ as shown below.
{
a=`eval echo \\$pattern$x`
echo $a
}
book
Why here twice "\" has to be... (3 Replies)
My Code :
--------------------------------------------
#!/bin/bash
for i in `echo server1 server2`
do
eval ${i}_name = "apache"
echo ${i}_name
done
--------------------------------------------
Current output :
>./test.sh
./test.sh: line 5: server1_name: command not found... (3 Replies)
Hi
I have a strange problem:
In my shell script I am performing a copy task:
. prop.txt
cp -r $dir/ $dir/archive
$dir is fetched from a property file (prop.txt) which stores its value
dir=/opt/data
Now the problem is another dir1 comes into picture. I only want to add... (1 Reply)
Hi
I am facing a problem.
export local_folder=/opt/app/
cd /opt/app/abc/
abcversion="abc*" (abcga5 is inside /opt/app/abc/)
echo $abcversion (it echoes the correct version as abcga5 )
Now when I reuse the value of abcversion for a below path:
export... (6 Replies)
Discussion started by: ankur328
6 Replies
LEARN ABOUT DEBIAN
snexpire
snexpire,v0.3.8(8) System Manager's Manual snexpire,v0.3.8(8)NAME
snexpire - expire news under the sn system.
SYNOPSIS
snexpire [-v] [-exp] newsgroup [[-exp] newsgroup]...
DESCRIPTION
snexpire expires news in the sn news system, one article file (=10 articles, compile time default) at a time. snexpire always leaves
behind at least one article file, so that newly entered articles will have numbers not overlapping previously used numbers. As an excep-
tion if the expiration age is set to 0, then even this last file will be expired and subsequent article numbers will start from the begin-
ning. You will need to be root or own /var/spool/sn to run snexpire.
OPTIONS -v Output a line for each article expired. The format of this line is the same as for snscan.
ARGUMENTS
snexpire expires all newsgroups named on the command line. Each newsgroup may be preceded by -exp to control the expiration age. exp is
of the form #[hdwmy] where # is a number, followed by one of the characters h,d,w,m,y representing hours, days, weeks, months and years.
The default for -exp is a compile-time fixed. Each [-exp] applies to the next newsgroup only, any newsgroups after that one get default
treatment unless overridden by another [-exp].
FILES MODIFIED
/var/spool/sn/newsgroup/.times, /var/spool/sn/newsgroup/[0123456789]*, /var/spool/sn/{.chain,.table}.
ENVIRONMENT VARIABLES
SNROOT If this is set and is not empty, the value is used in place of /var/spool/sn, the default news spool directory.
FILES
/var/spool/sn/newsgroup/.expire
If this exists, its contents are taken to be exp if not overridden by -exp on the command line.
N.B. Harold Tay snexpire,v0.3.8(8)