03-08-2011
Check what /usr/local/bin/hosts prints. That loop won't break until read fails for some reason. Try running /usr/local/bin/hosts by itself and see what it does.
You can't md5sum things like /etc/sudoers without root access. And automatic passwordless remote root access to every machine is scary, so maybe you don't want to check that one... That weird 'opened' must be part of an error message -- odd place for it to end up, I'd have expected them to go to stderr!
But we're getting there. It's definitely able to verify some files now.
This User Gave Thanks to Corona688 For This Post:
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I have a script that runs the grub-md5-crypt command based on whether the pass_value variable is a non-zero string. The md5 hash is being created in the /opt/hostconfigs/$HOST file, but I can't echo $md5_value. It is blank. Is there a way to create and echo a md5 hash variable?
if
then... (1 Reply)
Discussion started by: cstovall
1 Replies
2. Shell Programming and Scripting
Can anyone direct me to a resource that explains scripting in simple terms?
I have visited many sites and browsed this forum and have yet to find simple explanations. (8 Replies)
Discussion started by: rocinante
8 Replies
3. Shell Programming and Scripting
Hi
I want to write a small script that will create folders named from `AAAA' all the way to `ZZZZ'.
That is:
`AAAA'
`AAAB'
`AAAC'
...
`AABA'
`AABB'
`AABC'
...
`ABAA'
`ABAB'
`ABAC'
...
`ABBA'
...
`ZZZZ' (4 Replies)
Discussion started by: ksk
4 Replies
4. Shell Programming and Scripting
I have several unix servers,
I need to logon to each server and find out if an id exists on that server.
I need a simple script for this, i have come up with the following script, but I cannot bring the output of a child process on the remote server.
for i in `cat SERVER_LIST`
do
ssh $i... (5 Replies)
Discussion started by: ramky79
5 Replies
5. Solaris
I have a local account for a unix server. The idle timeout for the account is around 10 mins. I have to login to the server multiple times during the day. Is there a way to increase the idle timeout or may be a script that I can run on background so it is not idle. Something like echo date every 9... (3 Replies)
Discussion started by: vinaysa
3 Replies
6. Shell Programming and Scripting
Hello - I am in process of deleting many files which are older than 4 weeks.
For example I am inside:
/subsystem/prod/
Files are with various extentions, but anything older than 4 weeks should be deleted.
What would be the most simplest script to acheive this? (4 Replies)
Discussion started by: DallasT
4 Replies
7. Shell Programming and Scripting
Hello everyone,
I am looking to basically creating md5sum files for all iso files in a directory and archive the resulting md5 files into a single archive in that very same directory.
I worked out a clumsy solution such as:
#find files for which md5sum are to be created and store the... (1 Reply)
Discussion started by: SurfTranquille
1 Replies
8. Shell Programming and Scripting
Guys I want to do this:
copy:
/var/router/system1/config/backup/install.put
/var/router/system2/config/backup/install.put
/var/router/system3/config/backup/install.put
/var/router/system4/config/backup/install.put
into:
/var/router/system1/config/install.dat... (22 Replies)
Discussion started by: DallasT
22 Replies
9. Shell Programming and Scripting
Dear all,
I have a directory named A and some subdirectories named B, C, D with .xml files. I want to use the following command to strip the file.
sed -re ':start s/<*>//g; /</ {N; b start}' file.xml > file.xml
At the same time, I want to remove the blank lines using
sed '/^$/d'
How can... (6 Replies)
Discussion started by: corfuitl
6 Replies
10. Shell Programming and Scripting
Hello all!
This is my first post and I'm very new to programming. I would like help creating a simple perl or bash script that I will be using in my work as a junior bioinformatician.
Essentially, I would like to take a tab-delimted or .csv text with 3 columns and write them to a "3D" matrix:
... (16 Replies)
Discussion started by: torchij
16 Replies
LEARN ABOUT OSX
hosts.equiv
HOSTS.EQUIV(5) BSD File Formats Manual HOSTS.EQUIV(5)
NAME
hosts.equiv, .rhosts -- trusted remote hosts and host-user pairs
DESCRIPTION
The hosts.equiv and .rhosts files list hosts and users which are ``trusted'' by the local host when a connection is made via rlogind(8),
rshd(8), or any other server that uses ruserok(3). This mechanism bypasses password checks, and is required for access via rsh(1).
Each line of these files has the format:
hostname [username]
The hostname may be specified as a host name (typically a fully qualified host name in a DNS environment) or address, +@netgroup (from which
only the host names are checked), or a ``+'' wildcard (allow all hosts).
The username, if specified, may be given as a user name on the remote host, +@netgroup (from which only the user names are checked), or a
``+'' wildcard (allow all remote users).
If a username is specified, only that user from the specified host may login to the local machine. If a username is not specified, any user
may login with the same user name.
EXAMPLES
somehost
A common usage: users on somehost may login to the local host as the same user name.
somehost username
The user username on somehost may login to the local host. If specified in /etc/hosts.equiv, the user may login with only the same
user name.
+@anetgroup username
The user username may login to the local host from any machine listed in the netgroup anetgroup.
+
+ +
Two severe security hazards. In the first case, allows a user on any machine to login to the local host as the same user name. In the
second case, allows any user on any machine to login to the local host (as any user, if in /etc/hosts.equiv).
WARNINGS
The username checks provided by this mechanism are not secure, as the remote user name is received by the server unchecked for validity.
Therefore this mechanism should only be used in an environment where all hosts are completely trusted.
A numeric host address instead of a host name can help security considerations somewhat; the address is then used directly by iruserok(3).
When a username (or netgroup, or +) is specified in /etc/hosts.equiv, that user (or group of users, or all users, respectively) may login to
the local host as any local user. Usernames in /etc/hosts.equiv should therefore be used with extreme caution, or not at all.
A .rhosts file must be owned by the user whose home directory it resides in, and must be writable only by that user.
Logins as root only check root's .rhosts file; the /etc/hosts.equiv file is not checked for security. Access permitted through root's
.rhosts file is typically only for rsh(1), as root must still login on the console for an interactive login such as rlogin(1).
FILES
/etc/hosts.equiv Global trusted host-user pairs list
~/.rhosts Per-user trusted host-user pairs list
SEE ALSO
rcp(1), rlogin(1), rsh(1), rcmd(3), ruserok(3), netgroup(5)
HISTORY
The .rhosts file format appeared in 4.2BSD.
BUGS
The ruserok(3) implementation currently skips negative entries (preceded with a ``-'' sign) and does not treat them as ``short-circuit'' neg-
ative entries.
BSD
November 26, 1997 BSD