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Full Discussion: Removing File Entries With sed
Top Forums Shell Programming and Scripting Removing File Entries With sed Post 302424022 by jamba1 on Monday 24th of May 2010 03:49:43 AM
Old 05-24-2010
Removing File Entries With sed
Hi

When running the following sed command from the command line I am able to
remove all entries with #username from the file and redirect to another file.

Code:
sed -e 's/#.*//' -e '/^$/d' namesonly > tt

Code:
mv tt > namesonly

When I use the same command in the following script I end up with the original
entries in the namesonly file. ie nothing has been removed.


Code:
 
echo "" > f-output.log
 
USERS=$(awk -F: '{print $1}' allusers)
for U in $USERS
 
do
 
finger ${U} >> f-output.log
 
awk '/^Logi/ {a=$3} /^Last log/ {print a, $6}' f-output.log > lastlogin
 
grep -v "2009" lastlogin > lastlogin_1 ; grep -v ":" lastlogin_1 | sort | uniq > newlog_1
 
cut -d' ' -f1 newlog_1 > namesonly
 
sed -e 's/#.*//' -e '/^$/d' namesonly > tt ; mv tt namesonly

done

Is there an error with this command or something else causing the problem?

Any help appreciated.
 

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LEARN ABOUT DEBIAN

nwbpset

NWBPSET(1)							      nwbpset								NWBPSET(1)

NAME

       nwbpset - Create a bindery property or set its value

SYNOPSIS

       nwbpset [ -h ] [ -S server ] [ -U user name ] [ -P password | -n ] [ -C ]

DESCRIPTION

       nwbpset Reads a property specification from the standard input and creates and sets the corresponding property. The format is determined by
       the output of 'nwbpvalues -c'. nwbpset will hopefully become an important part of the bindery management  suite	of  ncpfs,  together  with
       'nwbpvalues -c'. See util/nwbpsecurity for an example.

       As another example, look at the following command line:

	 nwbpvalues -t 1 -o supervisor -p user_defaults -c |
	 sed '2s/.*/ME/'|
	 sed '3s/.*/LOGIN_CONTROL/'|
	 nwbpset

       With  this command, the property user_defaults of the user object 'supervisor' is copied into the property login_control of the user object
       'me'.

	 nwbpvalues -t 1 -o me -p login_control -c |
	 sed '9s/.*/ff/'|
	 nwbpset

       This command disables the user object me.

       Feel free to contribute other examples!

       nwbpset looks up the file $HOME/.nwclient to find a file server, a user name and possibly a password. See nwclient(5) for more information.
       Please note that the access permissions of $HOME/.nwclient MUST be 600 for security reasons.

OPTIONS

       -h
	  -h is used to print out a short help text.

       -S server
	  server is the name of the server you want to use.

       -U user
	  user is the user name to use for login.

       -P password
	  password  is	the  password to use for login. If neither -n nor -P are given, and the user has no open connection to the server, nwbpset
	  prompts for a password.

       -n
	  -n should be given if no password is required for the login.

       -C
	  By default, passwords are converted to uppercase before they are sent to the server, because most servers require this. You can turn off
	  this conversion by -C.

AUTHORS

       nwbpset was written by Volker Lendecke. See the Changes file of ncpfs for other contributors.

nwbpset 							     8/7/1996								NWBPSET(1)
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