$(..) is the syntax that replaced ` command something ` the result is the execution of the code between the braces..
For the quotes and double quotes its best you experience with them and you tell us what you understood: e.g.
So?
Problem: I have a shell script that will be called by a Perl module that will connect to a db and delete rows. The Perl module will be called by CRON. I am using a Perl module to call a shell script because I need to get the db connection from Perl.
Here is the Perl pseudocode:
... (4 Replies)
Dear all
I am still bit new in shell script area.I am writing down a shell script which I guess somewhere wrong so please kindly correct it. I would be greatful for that.
What I actually want from this shell script is that it will move all the files one by one to another server which can be... (2 Replies)
HI guys,
I have created a script to read 1 column in a csv file and then place it in text file.
However, when i checked out the text file, it is not in a column format...
Example:
CSV file contains
name,age
aa,11
bb,22
cc,33
After using awk to get first column
TXT file... (1 Reply)
Hi All,
Can any one solve this prob.
Im sending a textfile content as a mail body while sending a mail using shell script.
But, that textfile content is a unic command output.
So, in mail, im not getting the correct alignment as in textfile.
What may be the reason behind this.
Can... (1 Reply)
I have a bunch of files in various folders. I want to go through each of them and display certain lines in a particular format
All files have a similar format
Date:
Time:
User:
Message:
Miscellaneous:
(and some other stuff)I want to display to only the "Date:", "Time:" "User:" lines in... (7 Replies)
Hi Folks,
I have few mailids in a text file and need to check whether the mailid is in correct format or not.
If just to check whether the string is a mailid or not there is a perl module Email::Valid to do the business or we can implement our own logic.
But the mail_ids I am having is... (4 Replies)
Hi All,
I have new for shell scripting.
Problem : I have one scrip at serv1 and path of server is /apps/dev/provimage/scripts and script name:extract_ancillary.bat.
I need to call this script at server2(my working server) and execute at server2 .
Please let me know how to build the... (5 Replies)
Discussion started by: Vineeta Nigam
5 Replies
8. Post Here to Contact Site Administrators and Moderators
Hi All,
There are list of 4-5 .csv files which has 12 columns.In some cases one of the record is split into 2 records. What needs to be done is this split record has to be auto corrected and placed in the csv file.
Eg:
Let us consider sample.csv file and in normal conditions the file... (1 Reply)
Hi,
I have below data in my flat file.I would like to remove the quotes and comma necessary from the data.Below is the details I would like to have in my output.
Could anybody help me providing the Unix shell script for this.
Input :
ABC,ABC,10/15/2012,"47,936,164.567 ","1,036,997.453... (2 Replies)
I have a script that looks like this:
dirname2=/usr/tmp/filelist/*/*
for dirname2 in /tmp/filelist/*/*; do (cd $dirname2/catalog ||echo "file does not exist" && echo "$dirname2" |cut -d '/' -f 7,8 && echo $i && ls -la |awk 'NR>3 {SUM += $5} END { print "Total number of kb " SUM }');done... (2 Replies)
Discussion started by: newbie2010
2 Replies
LEARN ABOUT REDHAT
while
while(n) Tcl Built-In Commands while(n)
__________________________________________________________________________________________________________________________________________________NAME
while - Execute script repeatedly as long as a condition is met
SYNOPSIS
while test body
_________________________________________________________________DESCRIPTION
The while command evaluates test as an expression (in the same way that expr evaluates its argument). The value of the expression must a
proper boolean value; if it is a true value then body is executed by passing it to the Tcl interpreter. Once body has been executed then
test is evaluated again, and the process repeats until eventually test evaluates to a false boolean value. Continue commands may be exe-
cuted inside body to terminate the current iteration of the loop, and break commands may be executed inside body to cause immediate termi-
nation of the while command. The while command always returns an empty string.
Note: test should almost always be enclosed in braces. If not, variable substitutions will be made before the while command starts execut-
ing, which means that variable changes made by the loop body will not be considered in the expression. This is likely to result in an
infinite loop. If test is enclosed in braces, variable substitutions are delayed until the expression is evaluated (before each loop iter-
ation), so changes in the variables will be visible. For an example, try the following script with and without the braces around $x<10:
set x 0
while {$x<10} {
puts "x is $x"
incr x
}
SEE ALSO
break(n), continue(n), for(n), foreach(n)
KEYWORDS
boolean value, loop, test, while
Tcl while(n)