checkrhosts(8) Linux Users Manual checkrhosts(8)NAME
checkrhosts - program to check the users .rhosts files for security problems
SYNOPSIS
checkrhosts
DESCRIPTION
The checkrhosts program will check the users .rhosts files for any potential security problems. It will show which .rhosts files are inse-
cure and gives a short discription why the .rhosts is insecure and how this problem can be fixed.
FILES
~/.rhosts
AUTHOR
Peter Tobias <tobias@debian.org>
January 19, 1997 checkrhosts(8)
Check Out this Related Man Page
rhosts(4) Kernel Interfaces Manual rhosts(4)NAME
rhosts, .rhosts - Specifies remote users that can use a local user account
SYNOPSIS
$HOME/.rhosts
DESCRIPTION
The .rhosts file contains a list of remote users who are not required to supply a login password when they execute the rcp, rlogin, and rsh
commands using a local user account.
The .rhosts file is a hidden file in your home directory. It must be owned by you or the root user and it must not be writable by group or
world, otherwise, it is not used. Moreover, although it is not required, it is sensible to set the permissions of the file to 600, so the
file is not readable by group or world.
Each entry in the file is of the following form: host [user]
where: The name of the remote host. If the remote host is in a different domain than the local host, the full domain name must be speci-
fied. The login name of the remote user. This field is optional. If this field is not specified, any user on the specified remote host is
exempt from providing a password, and is assumed to have the same username on both the local and remote hosts.
Optionally, an NIS netgroup name can be specified for the host name, user name, or both.
Entries in the .rhosts file are either positive or negative. Positive entries allow access; negative entries deny access. The following
entries are positive: hostname username +@netgroup
In addition, the plus sign (+) can be used in place of the hostname or username. In place of the hostname, it means any remote host. In
place of the username, it means any user.
The following entries are negative: -hostname -username -@netgroup
EXAMPLES
The following sample entries in the /u/chen/.rhosts file on host zeus allow users moshe and pierre at remote host venus and user robert at
the hosts specified in the NIS netgroup chicago to log in to user chen's home directory on host zeus: venus moshe venus pierre +@chicago
robert
FILES
Specifies remote users who can use a local user account.
RELATED INFORMATION
Commands: rcp(1), rlogin(1), rsh(1).
Functions: ruserok(3).
Files: hosts.equiv(4), netgroup(4).
Functions: rcmd(3). delim off
rhosts(4)
I have a huge matrix file containing some 1.5 million rows and 6000 columns. The matrix looks something like this:
1 2 3
4 5 6
7 8 9
3 4 5
I want to add all the numbers in the columns of this matrix and display the result to my stdout. This means that the numbers in the first column are:
... (2 Replies)
Hi,
Just trying to get to grips with sed and awk for some reporting for work and I need some assistance:
I have a file that lists policy names on the first line and then on the second line whether the policy is active or not.
Policy Name: Policy1
Active: yes
Policy... (8 Replies)
version info :
vi availabe with RHEL 5.4
I have a text file with 10,000 lines. I want to copy lines from 5000th line to 7000th and redirect to a file. Any idea how I can do this?
Note:
The above scenario is just an example. In my actual requirement, the file has 14 million lines and I want... (9 Replies)
Hi everyone,
I know the following questions are noobish questions but I am asking them because I am confused about the basics of history behind UNIX and LINUX.
Ok onto business, my questions are-:
Was/Is UNIX ever an open source operating system ?
If UNIX was... (21 Replies)
Hello,
I couldn't find an actual introduction thread, so I decided to just put this here.
I go by d0wngrade online. I have been programming in multiple languages for about 15+ years. I started with standard web design languages like HTML and CSS, but I then advanced from design to development... (2 Replies)
Hi guys...
The first active code line in AudioScope.sh is set -u .
This causes a complete exit if a variable is used/found but has not been allocated at the start of the program.
However, apart from writing code to do the task, is there a switch to to check which variables have been... (17 Replies)
Hi.
In thread https://www.unix.com/shell-programming-and-scripting/267833-grouping-counting.html rovf and I had a mini-discussion on grep and awk.
Here is a demo script that compares the awk and grep approaches for this single problem:
#!/usr/bin/env bash
# @(#) s2 Demonstrate group... (1 Reply)
Hello,
I have to fish out some specific columns from a file based on the header value. I have the list of columns I need in a different file. I thought I could read in the list of headers I need,
# file with header names of required columns in required order
headers_file=$2
# read contents... (11 Replies)
For those interested in installing dash shell on OSX Lion to help test POSIX compliancy of shell scripts, it is quite easy. I did it like this:
If you don't have gcc on your system:
0. Download and install the Command Line Tools for Xcode package from Sign In - Apple *
1. Download the dash... (2 Replies)
Hello and thanks in advance for any help anyone can offer me
I'm trying to learn the find command and thought I was understanding it... Apparently I was wrong. I was doing compound searches and I started getting weird results with the -size test. I was trying to do a search on a 1G file owned by... (14 Replies)
I have data of an excel files as given below,
file1
org1_1 1 1 2.5 100
org1_2 1 2 5.5 98
org1_3 1 3 7.2 88
file2
org2_1 1 1 2.5 100
org2_2 1 2 5.5 56
org2_3 1 3 7.2 70
I have multiple excel files as above shown.
I have to copy column 1, column 4 and paste into a new excel file as... (26 Replies)
Dear All,
Taking a break from Vue.js coding for the site, SEO and YT videos; and hopefully addressing some well deserved criticism from some here that I have been too focused on the visual aspects of the forums versus the substance and the community....
While the "current generation... (9 Replies)
Hi all...
Well guys and gals, I jumped in at the deep end and found things that PERL cannot do by default.
Many tricky terminal escape codes are not catered for so I had to create workarounds.
One thing I searched for was this:
Passing perl variable to shell command
AND, @Neo this was... (15 Replies)