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Full Discussion: How do I remove commands?
Top Forums UNIX for Dummies Questions & Answers How do I remove commands? Post 302459608 by pinga123 on Tuesday 5th of October 2010 05:16:57 AM
Old 10-05-2010
From above methods i have noted down some methods of removing the command but i m yet confused which method should i follow.

As i m using it for my blog i have written it considering my blog in mind please help me evaluating the best one considering it wont affect other functionality.

It is highly recommended to remove following command on production server .
There are several ways of not using the command choose one that is suitable for your need.

Method 1:

Just try to find the rpm for the above command.
This can be done using.

Code:
rpm -qa | grep -i rsh
rsh-0.17-38.el5
rpm -qa | grep -i rcp
rpm -qa | grep -i rlogin

As you can see only first command return any output.

We need to further see what command rsh-0.17-38.el5 contains.

This can be done using

Code:
# rpm -ql rsh-0.17-38.el5
/usr/bin/rcp
/usr/bin/rexec
/usr/bin/rlogin
/usr/bin/rsh
/usr/share/man/man1/rcp.1.gz
/usr/share/man/man1/rexec.1.gz
/usr/share/man/man1/rlogin.1.gz
/usr/share/man/man1/rsh.1.gz


From the output you can assume that by uninstalling the rpm you can achieve the removal of those command from production server.


Method 2:

Change the file permisisons:

(First check the location of command using which command name.Below examples are given considering the commands are located under /usr/bin/rcp This could be different for different Linux Distributions.)
Code:
chmod 000 /usr/bin/rcp

chmod 000 /usr/bin/rsh

chmod 000 /usr/bin/rlogin

Method 3:

just remove execute bit of the command using.


(First check the location of command using which command name.Below examples are given considering the commands are located under /usr/bin/rcp This could be different for different Linux Distributions.)


Code:
chmod -x /usr/bin/rcp

chmod -x /usr/bin/rsh

chmod -x /usr/bin/rlogin

Method 4:

Remove the command itself using.

Code:
rm -rf `which rcp`
rpm -rf `which rlogin`
rpm -rf `which rsh`

Last edited by pinga123; 10-05-2010 at 06:34 AM..
 

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LEARN ABOUT MINIX

adb

adb(1)                                                             User Commands                                                            adb(1)

NAME

       adb - general-purpose debugger

SYNOPSIS

       adb [-kw] [-I dir] [-P prompt] [-V mode] [ object [ core]]

DESCRIPTION

       The  adb utility is an interactive, general-purpose debugger. It can be used to examine files and provides a controlled environment for the
       execution of programs.

       The adb utility is now implemented as a link to the mdb(1) utility in Solaris 9. mdb(1) is a low-level debugging utility that can  be  used
       to  examine  user  processes as well as the live operating system or operating system crash dumps. The new mdb(1) utility provides complete
       backwards compatibility with the existing syntax and features of adb, including support for processing adb macro files. The Solaris Modular
       Debugger  Guide  and  mdb(1)  man  page describes the features of mdb, including its adb compatibility mode. This mode will be activated by
       default when the adb link is executed.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE         |      ATTRIBUTE VALUE        |
       +-----------------------------+-----------------------------+
       |Availability                 |SUNWmdb                      |
       +-----------------------------+-----------------------------+

SEE ALSO

       mdb(1), attributes(5)

       Solaris Modular Debugger Guide

SunOS 5.10                                                          19 Aug 2003                                                             adb(1)
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