Closed. This question is off-topic. It is not currently accepting answers.
Want to improve this question? Update the question so it's on-topic for Stack Overflow.
Closed 9 years ago.
Improve this question
I'm using a simple shell script on my Linux server which checks if an rsync job is running or if any client accesses some directories from the server via Samba. If this is the case then nothing happens, but if are there no jobs and Samba isn't used than the server goes into hibernation.
Is there any simple command which I can use to check if an SSH connection to the server exists? I want to add this to my shell script so that the server doesn't hibernate if such a connection exists.
Scan the process list for sshd: .
Established connections look something like this: sshd: <username>…
ps -A x | grep [s]shd
should work for you.
use who command
it gives output like
username pts/1 2013-06-19 19:51 (ip)
You could parse that to see how many non locals are added and get their usernames (or there are options see man who for more info
gives a count of how many non localhost users there are
who | grep -v localhost | wc -l
Related
Closed. This question is off-topic. It is not currently accepting answers.
Want to improve this question? Update the question so it's on-topic for Stack Overflow.
Closed 9 years ago.
Improve this question
I'm using linux mint xfce edition, my localhost:80 was used by some program but I don't which one, when I open firefox and visit localhost:80, it says
It works!
This is the default web page for this server.
The web server software is running but no content has been added, yet.
I've tried to use lsof -i #localhost:80, but it returns nothing.
netstat -anpt | grep :80 as root user should list process using port 80.
With your web browser closed it can help you identify the process.
Try this:
# fuser -n tcp 80
From the manpage:
-n SPACE, --namespace SPACE
Select a different name space. The name spaces file (file names,
the default), udp (local UDP ports), and tcp (local TCP ports)
are supported. For ports, either the port number or the symbolic name can
be specified. If there is no ambiguity, the shortcut
notation name/space (e.g. 80/tcp) can be used.
Closed. This question is off-topic. It is not currently accepting answers.
Want to improve this question? Update the question so it's on-topic for Stack Overflow.
Closed 9 years ago.
Improve this question
I am in my local computer, and i just want to test reverse ssh so that i access computer 2 and access computer 3 through computer 2 and make computer 3 respond to me in lets say i want to access postgresql on computer 3.
how to do that with ssh and using ports? 5432 is the port of sql
my approach is this:
ssh -L 3000:localhost:5432 <ipaddressof the 2nd computer>
so im inside 2nd computer now.
in the terminal again i type:
ssh -L 3000:localhost:5432 <ipaddress of the 3rd computer>
and im inside the 3rd computer now. And i dont know what to do anymore, how to access its sql?
i tried this code which doesn't work:
psql -U myusername -p 3000
Try the following:
ssh -L localhost:3000:<ip address 3rd computer>:5432 <ip address 2nd computer>
And then:
psql -U myusername -h localhost -p 3000
This works if:
The 2nd computer has access to the 3rd computer
The sshd config on the 2nd computer allows TCP forwarding (default is yes)
Closed. This question is off-topic. It is not currently accepting answers.
Want to improve this question? Update the question so it's on-topic for Stack Overflow.
Closed 9 years ago.
Improve this question
I'm using the command ssh -i /home/ssh_keys/10_1_1_127 root#10.1.1.127 date for checking the date on some other machine,
If some parameter is wrong, like the user, the ip or the identity file doesn't exists,
ssh asks for password
for example, if I write ssh -i /home/ssh_keys/10_1_1_1277 root#10.1.1.127 date
whilst /home/ssh_keys/10_1_1_1277 doesn't exists, I get:
root#10.1.1.127's password:
I wanted to know if it is possible, and if so, then how to make ssh fail if some parameter isn't right, so ssh won't ask me for a password if I enter wrong parameters...
Thanks
All these changes should be done via root or a sudo enabled user.
In /etc/ssh/sshd_config set the following entries to no:
ChallengeResponseAuthentication no
PasswordAuthentication no
UsePAM no
If you need help finding those specific lines, use grep:
grep -n "PasswordAuthentication" /etc/ssh/sshd_config
^^or whatever^^
This outputs the line number
Then restart ssh
/etc/init.d/ssh restart
or
service ssh restart
depending on your flavor of Linux.
Closed. This question is off-topic. It is not currently accepting answers.
Want to improve this question? Update the question so it's on-topic for Stack Overflow.
Closed 10 years ago.
Improve this question
I've started multiple ssh services at a range of port for a particular testing using
/usr/sbin/sshd -p portnumber
How do i stop service at a specific port where i've started ?
I've seen this command (But dats general, i have to stop at a specific port)
/etc/init.d/ssh stop
To stop all instances you can use:
killall sshd
If you want a specific one you need to use ps aux | grep sshd -p <port>. There you get the pid (process id) which you can simply kill by kill <pid>.
Closed. This question is off-topic. It is not currently accepting answers.
Want to improve this question? Update the question so it's on-topic for Stack Overflow.
Closed 10 years ago.
Improve this question
How can I find where my httpd.conf file is located?
I am running an Ubuntu Linux server from the Amazon Web Services EC2 (Elastic Compute Cloud) and I can't find my Apache config.
Get the path of running Apache
$ ps -ef | grep apache
apache 12846 14590 0 Oct20 ? 00:00:00 /usr/sbin/apache2
Append -V argument to the path
$ /usr/sbin/apache2 -V | grep SERVER_CONFIG_FILE
-D SERVER_CONFIG_FILE="/etc/apache2/apache2.conf"
Reference:
http://commanigy.com/blog/2011/6/8/finding-apache-configuration-file-httpd-conf-location
See http://wiki.apache.org/httpd/DistrosDefaultLayout for discussion of where you might find Apache httpd configuration files on various platforms, since this can vary from release to release and platform to platform. The most common answer, however, is either /etc/apache/conf or /etc/httpd/conf
Generically, you can determine the answer by running the command:
httpd -V
(That's a capital V). Or, on systems where httpd is renamed, perhaps apache2ctl -V
This will return various details about how httpd is built and configured, including the default location of the main configuration file.
One of the lines of output should look like:
-D SERVER_CONFIG_FILE="conf/httpd.conf"
which, combined with the line:
-D HTTPD_ROOT="/etc/httpd"
will give you a full path to the default location of the configuration file