Unix is a multitasking, multi-user computer operating system originally developed in 1969 by a group of AT&T employees at Bell Labs.

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2
votes
2answers
162 views

how to configure firewall with “psad” utility to avoid port scan

I am trying to configure psad to stop port scanning and other attacks. Currently I have following rules set for my firewall which drops all incoming connection except port 22,80,443 and 3306. -A ...
3
votes
2answers
814 views

How to tell the difference between “No such file or directory” and “Permission Denied”

I'd rather not parse STDERR, but I can't think of another way to tell the difference, programmatically, between the two: $ ls /net/foo.example.com/bar/test /net/foo.example.com/bar/test: Permission ...
0
votes
2answers
99 views

keep in tar.bz2 original directory datetime

I'm looking for a solution to create a tar.bz2 file and keep the original folder timestamp. My solution is "touch -t {original timestamp}" file.tar.bz2 manuel@mfpanzuela:~$ ls -la drwxrwxr-x 2 ...
2
votes
0answers
326 views

Solaris 9: Degraded mirror unmanageable with raidctl after drive replacement

We have a pair of Sunfire v20z's (WITH LSI MPT raid) that have each had one drive in their mirrors die. bash-2.05# cat /etc/release Solaris 9 4/04 s9x_u6wos_08a x86 ...
1
vote
0answers
38 views

Redhat quitting process never works always have to kill it

I am working on a RedHat server creating a unicorn process. I have two sets of these processes being created. I am able to QUIT one of the process fine and do so over and over again create it and QUIT ...
0
votes
1answer
60 views

OSAS v4 Open Systems Accounting Software [closed]

My company recently purchased another company and along with it, came an old SCO Openserver (v5) running OSAS v4. We use TinyTerm as recommended to access this but no one knows how to use it. I've ...
0
votes
1answer
572 views

Unable to clear sendmail mqueue-client

drwxr-xr-x 2 smmsp smmsp 4.0K May 6 23:31 mqueue drwxrws--- 2 smmsp smmsp 29M May 8 10:40 mqueue-client As you can see mqueue-client is filled with 29 megabytes of unsent mail. This seems to ...
-4
votes
1answer
87 views

Server that transfers FTP to FTPS without downloading on my PC [closed]

I need to do a server to server transfer, and the data is about 1 TB in size. One server supports plain FTP, but the other mandates FTPS. Both servers are located in the US. If the data was within a ...
1
vote
1answer
95 views

How to change protected config files via web/php interface?

I'm looking for way to modify configuration file that resides below /etc directory via web (in particular case PHP) interface. While it's not a problem to read (if you set up file permissions ...
0
votes
2answers
51 views

If a web root directory has a simlink that points to a folder one-level up, does that pose a security risk?

Assuming a Linux/Unix system. Not asking about any particular server software, just wondering in general. I want to use this to include javascript libraries or things like that in multiple sites or ...
2
votes
1answer
4k views

502 Bad Gateway Error Nginx connect() to unix:/tmp/unicorn.sock failed

This is my first question on Server Fault. I could not find a solution to this while searching the web. I am working on an OpenBSD server running Nginx, which I did not setup, that is throwing a 502 ...
-1
votes
2answers
80 views

Security in users having sudo access

How to protect my passwords list (in different databases for example) in a UNIX environment where most of the users have sudo access to other user IDs? I have a script (main.sh) with the following ...
0
votes
1answer
101 views

Give user permission to create/delete particular file?

Is it possible to give a user permission to create/delete a file at a certain path, but not to modify other files in the same directory?. I'm using Ansible to provision a CentOS 6.4 box. I'd like to ...
2
votes
1answer
435 views

Create a link to the Unix socket [duplicate]

Is there a possibility to create a hard link for an unix socket? I'm creating a jail and symbolic links won't work, so I'm looking for a solution, how to provide an unix socket inside chrootted ...
2
votes
3answers
270 views

How do i change the global login shell on a unix system?

I want to set the login shell (the shell they get when they log in) of all existing and future users. The correct way to change the login shell seems to be chsh. But this only allows me to change the ...
1
vote
2answers
2k views

Environment variables are unavailable when running scripts over ssh

Suppose I have two hosts: A and B with users a and b. B is Windows machine with Cygwin installed, if this matters. B is configured to be accessed from A through SSH without password (it contains A's ...
2
votes
1answer
165 views

How can I make my own linux distro? [closed]

My question is bit off-topic or may be impractical. The thing is, on the web too many material available to download customized linux distro. But what if I want to make my own linux distro ? ...
0
votes
2answers
967 views

Saving SSL password for SVN in Ubuntu

I have tried to set up my SVN that way, that it saves my passwords, but for some reason it won't work. I am using a SSL certificate, for which I need to provide a password every time. I have tried ...
2
votes
0answers
27 views

Process identifier mask in z/OS

I've noticed a curious pattern to process identifier numbers on the z/OS system I'm working on (uname reports it as OS/390), they're either 1-4 digits long or 8 digits long but never in between. The ...
0
votes
2answers
237 views

Using Jenkins to access mysql files on the same instance

I have a Jenkins installation and running mysql server on the same box. One of my jenkins jobs is supposed to tar up the /var/lib/mysql folder but I get the following error tar: ...
1
vote
1answer
55 views

How do I accept two different types of network connections using iptables

I need to setup iptables for a mongodb database server, such that it allows only two types of INPUT connections: one connection to port 27017, monogdb's default port, from our main web-app one ssh ...
0
votes
3answers
704 views

Exclude with the find command [duplicate]

I need some help getting the find command to work right in a script working on. I need to be able to exclude some directories. Below I have what I'm doing as a work around. sudo find / ( -name ...
1
vote
2answers
119 views

How do I show listening open ports from the shell?

I always have to google this and ServerFault is never the first result. Typically I want to do this on a unix box, but I'd also like to know how to do it on a Windows machine from CMD.exe.
0
votes
2answers
992 views

CPU usage command for monitor script

Is there a command for FreeBSD (except the top -P) I could use to monitor my dedicated server CPU usage? I am in progress of writting my bash script which will notify me as soon as any of the CPU core ...
1
vote
1answer
63 views

Viewing the packet-size of an incoming IP

I have been looking for a sulution to this for a few hours. after no avail im asking for help here. I need to watch my incoming packets by Size. in a format similar to: IP SIZE I have tried ...
1
vote
1answer
558 views

Can sftp check for existing data?

I have 700 binary files (pdf) to download and right now only 400 are available on a sftp server. Can sftp, from the cli, determine what files exist in the local directory so it doesn't need to ...
3
votes
1answer
6k views

Can't log in to FTP on Debian with vsftpd

Linux noob here so please bear with me :) I'm trying to setup FTP access to my Apache server but I'm receiving a 530 Login Incorrect error. I installed the vsftp package via sudo apt-get install ...
0
votes
2answers
161 views

How to block rejected messages I did not send?

In exim mainlog I see a lot of rejected messages I did not actually sent (they were send from spammers). 2014-02-20 23:42:47 H=a94-132-158-40.cpe.xxxxxxx.pt (zonhub) [94.132.xxx.xxx] ...
3
votes
1answer
657 views

dmesg time vs system time time isn't correct

I hope that here is somebody that can help me with this strange problem. I think that i know why it is happening but i don't know how to solve it. Maybe it is because the BIOS time isn't set correct ...
4
votes
2answers
2k views

How do you tell if a user is “allowed to log in” on Linux?

The question is simple, I want to list all the user accounts which can log in to my system, but I'm not sure if that all the users in /etc/passwd are "could login" users? Details: I can see users ...
0
votes
2answers
492 views

Portforwarding with IPTABLES and Remote IP detection

I was able to forward 80 port from my primary server 192.168.90.1 to the second one 192.168.90.2 with IPTABLES The primary server has a public address X.X.X.X so I forwarded X.X.X.X:80 -> ...
1
vote
1answer
66 views

How to delete special character in linux

By mistake I made a file with the name \. How do you delete something like that? I've tried rm --\ rm "\" rm -- -\and nothing seems to work. I bet it's so simple but I'm stumbled - any suggestions?
0
votes
1answer
236 views

Fix Solaris 11 GNU tools location for RVM

I am trying to install RVM on a Solaris 11 system, the curl -sSL https://get.rvm.io | bash -s stable went through, but when I actually try to use rvm, it simply stats "ERROR: Missing GNU tools: grep ...
1
vote
2answers
678 views

SSH Tunnel or Reverse Tunnel

I'm trying to establish a SSH tunnel to allow VNC/ARD connections (ports 5900 and 3389). However I'm uncertain about a certain thing: Let's say machine A has IP 192.168.103.1 and has services running ...
1
vote
1answer
47 views

Windows process management tools

Unix has tools like upstart, angel, god, etc to keep processes running constantly on system start and can restart processes that have failed. Does windows have the ability to do this natively?
13
votes
3answers
1k views

Is there a mechanism in Unix (or Linux) to stop an in-progress core dump?

Let's say a (very) large process is crashing and dumping core, and we know the cause from other information (possibly an assert message, maybe something else). Is there a way to stop the core dump ...
-1
votes
1answer
2k views

KVM-Host OS recommendation [closed]

I am about to migrate a server installation (one OS) to a newer hardware and wish to enable/use KVM. So the hardware is fixed (https://www.hetzner.de/hosting/produkte_rootserver/ex40) , now I got the ...
-2
votes
2answers
150 views

How to block access to a local user to a local port?

How to block access to a local user to a local port? Example: user Elvis should not have access to the port 25600 on the same server.
0
votes
2answers
86 views

Control IP to access a server , which use iptables

I would like to use linux command iptables to control to only allow the same subnet IP to access a server , what I would like to do is to allow any services from 10.168.1.0 to this server , could ...
22
votes
6answers
3k views

Can a program tell it is being run under sudo?

I have a program that should behave differently if it is being run under "sudo". Is there a way it can find out if it was run under sudo? Update: Someone asked why would I want to do this. In this ...
2
votes
2answers
72 views

redundancy in a single SCSI target

following-on from my earlier question about resurrecting an ancient Intergraph 6800 machine (licence file for extra logins on ancient Unix (CLIX) system), the original problem was a failed hard disk ...
1
vote
0answers
90 views

Mac OS 10.6.8 Firewall Blocking Wiki for ONE User

This is a very bizarre issue that I hope someone can help with. We're running 10.6.8 server to host our internal wiki. We had the firewall enabled on that machine without any issues. Last week one ...
1
vote
0answers
66 views

Is there a way for a user to temporarily remove its own group membership within a script?

I'm writing a script which will be used to "detect" whether a generic, no-frills, user account has access to certain files. Basically a user which only has membership in the "staff" group or ...
1
vote
0answers
416 views

rsyslog logging same data to multiple files

I'm new to configuring rsyslog for centralized logging and was wondering if one of you experts could help me with the following problem. I am trying to store logs for each remote host to a per host ...
0
votes
2answers
1k views

How to kill the process using the name of the program instead of PID?

I started my Python program in the background using nohup as mentioned below - nohup zook.py & Now I am trying to kill this process so I did the ps command as mentioned below ...
1
vote
2answers
228 views

How do I iterate bash arrays and make an SCP command efficiently?

I need to scp the files from machineB and machineC to machineA. I am running my below shell script from machineA. I have setup the ssh keys properly. If the files are not there in machineB, then it ...
9
votes
4answers
430 views

Linux cd .. command

Say if I need to do this a lot: cd ../../../../foo/sub1/bar/dest/ cd ../../../../foo2/sub1/bar/dest/ cd ../../../../foo3/sub1/bar/dest/ cd ../../../../foo/sub1/bar/dest/ Is there any faster way to ...
1
vote
2answers
1k views

Logging ssh info using syslog-ng daemon in Cygwin

I have setup the syslog-ng daemon using Cygwin in Windows 7. What I want to do is to log all of the ssh failed passwords, etc to /var/log/sshd.log. I tried to do this by adding the following line: ...
3
votes
1answer
213 views

ISC DHCPD memory leak solutions and or workarounds

Background: I have recently been put in charge of finding the root of and/or fixing a memory leak with an ISC DHCPD (4.2.5-P1) installation on a Debian (Lenny) Unix server. I have been researching ...
-1
votes
1answer
265 views

Https not working JBoss AS 7.0.2

I am trying to load SSL certificate to one of our site. We are using JBoss AS 7.0.2 for our application on Ubuntu Server 12.04, it's running successfully on http while on https it's not responding. ...