I am new to shell scripting, but doing my best to learn things. Today doing courses there was exercise like this:
I improved it a little, beacuse of curiosity to this:
And here is funny thing: when you put vaules to script as: ./script b b it shows that conditions are met, but they shouldn't - at least accroding to the first script they shouldn't, the thing I changed is sensitivity for small letters.
Maybe it's written wrong? Have no idea, please advise
I have a folder with lots of file. e.g. a.txt, b.txt, c.txt.... I want to put these files from the source directory and place them in a destination directory in a specific order, such as /destination/a/a.txt, /destination/b/b.txt, /destination/c/c.txt, ......
Please help. Thx :confused: (3 Replies)
I would like to get a sample script (ksh or bash, or both so I could see the differences)
What I want to do with the script is send an daily email to myself that contains the following:
The number of files in a directory
The total size of the files in that directory
The contents of a file... (2 Replies)
Hi Folks,
New member here. I have been using UNIX systems for the past ~4 years (Linux, AIX, HP-UX, mostly) but have never had the need to write a script for myself. Now, things have changed and I'm in a bit of a pickle. I have, what looks to me like a syntactically correct script that's not... (2 Replies)
I am in an intro to unix/linux course, and need some help with a project. We are tasked with creating a basic script to automate a task that an Admin might need to do. We submitted ideas and mine was to have the system keep a record of log in and log out times for users. I thought this was going... (3 Replies)
. ./testFile.sh
url=http://ichart.finance.yahoo.com/table.csv?s= suf=&d=5&e=9&f=2009&g=d&a=1&b=4&c=1999&ignore=.csv
wget $url$s1$suf;
sleep 10;
cat header.txt > $s1.txt;
chmod 777 $s1.txt;
sed '1d' table.csv?s\=$s1 >> $s1.txt;
rm -Rf table*
Very new at shell scripting as you can see... (3 Replies)
I have been following a tutorial on bash which has proven to be very helpful. However, i am stuck with a command not found issue when asking for a y/n response from the user. Below is the part of code I believe is giving me grief... I have been trying to work through this for 3 hours now.... Please... (5 Replies)
Hello,
I'm new to Sheel script and I need your help for a script I need to develop (for me).
Indead, I have a software which log all entry from internet and save it in text file.
But, the log is practically unreadable because every 256 characters jump to a new line (even if the message is... (5 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
"Create a shell script that changes the selected word to another word in all files from selected archive. The... (1 Reply)
1. The problem statement, all variables and given/known data:
Arguments:
http://farm9.staticflickr.com/8070/8212131370_8b6e8c10c5_c.jpg
I am given these three arguments. $1, $2, $3
The first argument is the path to a directory.
So, how would I go into the directory and compare files?
I... (5 Replies)
Hi, so I have been doing ok making a relatively simple script just processing some data. However I am now at the point where im struggling to find the specific help I need.
I have files in the form of yyyy.ddd.hh.mm.ss.stationnumber.component (they are earthquake events). eg.... (12 Replies)
Discussion started by: neneman3000
12 Replies
LEARN ABOUT REDHAT
escape
escape(1) Mail Avenger 0.8.3 escape(1)NAME
escape - escape shell special characters in a string
SYNOPSIS
escape string
DESCRIPTION
escape prepends a "" character to all shell special characters in string, making it safe to compose a shell command with the result.
EXAMPLES
The following is a contrived example showing how one can unintentionally end up executing the contents of a string:
$ var='; echo gotcha!'
$ eval echo hi $var
hi
gotcha!
$
Using escape, one can avoid executing the contents of $var:
$ eval echo hi `escape "$var"`
hi ; echo gotcha!
$
A less contrived example is passing arguments to Mail Avenger bodytest commands containing possibly unsafe environment variables. For
example, you might write a hypothetical reject_bcc script to reject mail not explicitly addressed to the recipient:
#!/bin/sh
formail -x to -x cc -x resent-to -x resent-cc
| fgrep "$1" > /dev/null
&& exit 0
echo "<$1>.. address does not accept blind carbon copies"
exit 100
To invoke this script, passing it the recipient address as an argument, you would need to put the following in your Mail Avenger rcpt
script:
bodytest reject_bcc `escape "$RECIPIENT"`
SEE ALSO avenger(1),
The Mail Avenger home page: <http://www.mailavenger.org/>.
BUGS
escape is designed for the Bourne shell, which is what Mail Avenger scripts use. escape might or might not work with other shells.
AUTHOR
David Mazieres
Mail Avenger 0.8.3 2012-04-05 escape(1)