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Append input to file from script

Posted on 2008-06-24
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Last Modified: 2010-04-21
Previously you all helped me create a script to add a user with some custom home folder stipulations. Now I'd like to modify the script to append $2 to /etc/ftpusers.

I've commented out the line I hoped would work for this purpose, but it overwrites the ftpusers file, instead of appending. Do I need to use cat instead?

Thanks!

****

mkuser:
if test $# -eq 0
then
      echo "Usage: ./mkuser firstname_lastname_location userid"
      exit 1
fi
#echo $2 >> /etc/ftpd/ftpusers
useradd -d /usr/igi/avante95/flodata/live/LIVE.DATA -c $1 $2
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Question by:crcevans
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7 Comments
 
LVL 29

Accepted Solution

by:
MikeOM_DBA earned 125 total points
ID: 21857510

echo $2 >> /etc/ftpd/ftpusers

Should (does) NOT overwrite the file.
0
 

Author Comment

by:crcevans
ID: 21857645
Now I have the following:

****
echo $2 >> /etc/ftpd/ftpusers
useradd -d /usr/igi/avante95/flodata/live/LIVE.DATA -c $1 $2
****
I need $2 on a new line in ftpusers, instead of appended to the previous line. How do I do that?
0
 
LVL 29

Expert Comment

by:MikeOM_DBA
ID: 21858819

Try:
echo -e "\n$2" >> /etc/ftpd/ftpusers


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Author Comment

by:crcevans
ID: 21859328
For whatever reason, the original echo statement is what is working.

Thanks for your help!

****final script****
# more /home/UN/mkt
if test $# -eq 0
then
      echo "Usage: ./mkuser firstname_lastname_location userid"
      exit 1
fi
echo $2 >> /etc/ftpd/ftpusers
useradd -d /usr/igi/avante95/flodata/live/LIVE.DATA -c $1 $2
0
 
LVL 16

Expert Comment

by:Hanno Schröder
ID: 21863297
Usually, the original file should have a newline (\n) at the end of it's
last line. Therefore, when you add something using
   echo "some stuff to add" >> myfile
it will get appended as another line, including another newline at
the end.
0
 

Author Comment

by:crcevans
ID: 21865190
Ah, so perhaps the fact that I edited the file in a windows editor and then FTPd it over is the reason it didn't have the /n on that last line the first time I tried your suggestion?
0
 
LVL 16

Expert Comment

by:Hanno Schröder
ID: 21865712
Windows (DOS) and Unix have different line endings:
- Unix has a newline (\n) at the end
- DOS has carriage return and newline at the end (\r\n)

If you transfer files from DOS (windows) to Unix using FTP in ASCII (or text)
mode, it will do the conversion for you.
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