11-22-2011
Reserv memory for uid 0 / sshd+shell
Hi!
Does someone know how to ensure that root user always will be able to login to a system?
What I mean is when a server is out of RAM and swapping like hell; sshd may spawn a shell and login root user to save the day?
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
I don't know how to ask this clearly, so I'll try my best...
At what point does a shell script stop reading from a file, and begin using the buffered script?
Hopefully, this example will shed some light:
#!/usr/bin/ksh
value=""
until ; do
sleep 10
print "What is your value?"
#print... (5 Replies)
Discussion started by: LivinFree
5 Replies
2. UNIX for Dummies Questions & Answers
i just downloaded and installed succesfully openssh server, and am running it on netbsd 1.5, i can not login with anyuser, i enabled root login just to see what happens and i can login as root, but no other user, i checked my config and most things are default, whats going on? has any one else had... (2 Replies)
Discussion started by: norsk hedensk
2 Replies
3. AIX
Friends,
I made the installation of the ssh in the it conspires,
I configured in the ssh_config the following
parameters..
SyslogFacility AUTH
LogLevel INFO
that should generate sshd.log in the /var/log.... more no this generating.
Somebody could help myself in... (0 Replies)
Discussion started by: sandba
0 Replies
4. UNIX for Advanced & Expert Users
It is a little bit weird to me when i found this on a solaris 9 system with openssh package. Below is the result copied from "top" output:
PID USERNAME LWP PRI NICE SIZE RES STATE TIME CPU COMMAND
13491 root 1 59 0 27M 18M sleep 0:06 0.00% sshd -i
20198 root ... (1 Reply)
Discussion started by: sleepy_11
1 Replies
5. Solaris
My ssh log appear to the screen which i want it to be log to /var/log/sshd.log
how to log the sshd to /var/log? (5 Replies)
Discussion started by: hezry79
5 Replies
6. Solaris
I have shamelessly tried all the possible ways to see if my /var/adm/loginlog logs user access entries for ssh but nothing has worked for me so far..:confused:
for telnet login its working fine.
Adding auth.info in syslog.conf works but i dont want that output.
Is there any way to edit... (2 Replies)
Discussion started by: ningy
2 Replies
7. AIX
Friends,
Need someone's help in helping me with the below requirement for a script:
> For a list of servers(over 100+), I need to login into each of them(cannot configure password-less ssh) & grab few configuration details <
I know, this is possible through expect programming in a simple... (2 Replies)
Discussion started by: thisissouvik
2 Replies
8. Shell Programming and Scripting
Friends,
Need someone's help in helping me with the below requirement for a script:
> For a list of servers(over 100+), I need to login into each of them(cannot configure password-less ssh) & grab few configuration details <
I know, this is possible through expect programming in a simple... (14 Replies)
Discussion started by: thisissouvik
14 Replies
9. Shell Programming and Scripting
Dear,
How to calculate %computational memory and %non computational memory from AIX server.
What command used to find out %computational memory and % non computational memory except topas.
Regards
Nowshath (1 Reply)
Discussion started by: Nowshath
1 Replies
10. Red Hat
Hi,
Do you know what cause the error message ?
Nov 19 13:42:19 cfsasnd02 sshd: pam_env(sshd:setcred): non-alphanumeric key '-- /etc/environment' in /etc/environment', ignoring
Nov 19 13:42:20 cfsasnd02 sshd: pam_env(sshd:setcred): non-alphanumeric key '-- /etc/environment' in... (0 Replies)
Discussion started by: xitrum
0 Replies
chsh(1) General Commands Manual chsh(1)
NAME
chsh - change default login shell
SYNOPSIS
login-name [shell]
login-name [shell]
login-name [shell]
login-name [shell]
DESCRIPTION
The command changes the login-shell for a user's login name in the repository (see passwd(1)).
The DCE repository is only available if Integrated Login has been configured; see auth.adm(1M). If Integrated Login has been configured,
other considerations apply. A user with appropriate DCE privileges is capable of modifying a user's shell; this is not dependent upon
superuser privileges.
If the repository is not specified (as in [login-name]), the login shell is changed in the file only.
Run after running to make sure the information was processed correctly.
Notes
The command is a hard link to the command. When is executed, actually the command gets executed with appropriate arguments to change the
user login shell in the repository specified in command line. If no repository is specified, the login shell is changed in the file.
Arguments
login-name A login name of a user.
shell The absolute path name of a shell. If the file exists, the new login shell must be listed in that file. Otherwise, you
can specify one of the standard shells listed in the getusershell(3C) manual entry. If shell is omitted, it defaults to
the POSIX shell,
Options
The following option is recognized:
Specify the repository to which the operation is to be applied.
Supported repositories include and
Security Restrictions
You must have appropriate privileges to use the optional login-name argument to change another user's login shell.
NETWORKING FEATURES
NFS
File can be implemented as a Network Information Service (NIS) database.
EXAMPLES
To change the login shell for user to the default:
To change the login shell for user to the C shell:
To change the login shell for user to the Korn shell in the DCE registry:
WARNINGS
If two or more users try to write the file at the same time, a passwd locking mechanism was devised. If this locking fails after subse-
quent retrying, terminates.
AUTHOR
was developed by HP and the University of California, Berkeley.
FILES
SEE ALSO
chfn(1), csh(1), ksh(1), passwd(1), sh(1), sh-posix(1), getusershell(3C), pam(3), passwd(4), shells(4).
chsh(1)