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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2answers
547 views

dsh (dancer's shell): is it possible to specify ports in config file?

Using dsh you can define the list of machines in ~/.dsh/machines.list in the form: <user>@<host> I'd like to have multiple hosts with different ssh ports, like this (I tried): ...
-1
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1answer
38 views

Can a Node.JS program write to disk if it is ran as a user without root privileges?

I am about to set up a VPS with a user that lacks root privileges. I also have a Node.JS server that writes files to the disk. If I run this program/server without root privileges, will it still be ...
1
vote
4answers
16k views

Getting full path of executables in ps auxwww output

Consider the following lines from a "ps auxwww" output: USER PID %CPU %MEM VSZ RSS TT STAT STARTED TIME COMMAND root 4262 0.0 0,1 76592 1104 s005 Ss 10:02am ...
2
votes
2answers
940 views

pam_exec.so PAM module does not export variable PAM_USER as stated in the documentation

I'm trying to use the pam_exec.so PAM module to execute a script which needs to know the username/password coming from the application (OpenVPN in this case). I have a script that executes printenv ...
0
votes
1answer
292 views

Writing to Unix Domain Socket from rsyslog

I want to write output messages from rsyslog to a Unix Domain Socket. I want to do this so that I can read the messages from that socket using my script and parse log messages further. I try to use ...
7
votes
4answers
16k views

How to move directory from one server to other?

I have SSH access to the both servers, one of them is empty. How can I move site directory from old server to new server via SSH connection? PS: On both servers is unix
1
vote
1answer
193 views

How can I add an X-header to unix mailx?

I am attempting to add the x-header X-APP-VOLT: Yes to the header of my email with a .tar attachment. I only have access to usr/sbin/sendmail and mailx. I do not have root access so I can't download ...
8
votes
6answers
12k views

How to properly shutdown or reboot a Unix/Linux server

What is the correct way to turn off a Unix/Linux server? From my googling, I have learned (hopefully) the following: shutdown: I should use this, with the parameter -h to halt, or the parameter -r ...
8
votes
3answers
9k views

apt-get update/upgrade list without changing anything

I would like to view what packages are available for update/upgrade without actually changing any files becuase there are some packages I wouldn't like to update. Would it then be possible to apt-get ...
0
votes
1answer
57 views

Apache Web Server Virtual Hosting

i'm making a apache web server with two virtual host, i have a DNS Server caching-only on my other centos 6 minimal VM, the IP Address of my Apache Server is 192.168.1.9, when i try to browse that IP ...
4
votes
5answers
3k views

Appending output to a file at the same time truncating it to N lines

I'm trying to find a simple way to append/write to a log, while at the same time keeping it the log trimmed to a reasonable size. I would prefer to not just append files forever, and then have to have ...
3
votes
3answers
2k views

How do I disable command line history in Linux?

Right now, I'm aware that for all commands typed into the console, the Ubuntu system logs it somewhere. How can I disable logging of unix commands for all users?
4
votes
1answer
195 views

What is a solid process for designing a monitoring system?

The short version: I've got a heterogeneous environment of ~400 hosts using Groundwork/Nagios for monitoring. The current checks, hostgroups, and servicegroups have been put together in an organic, ...
42
votes
2answers
5k views

Why do I have to edit /etc/sudoers with visudo?

I've noticed that the sudoers file and cron config files act in a special way compared to other config files on Linux. They need to be edited with a special wrapper rather than any text editor. Why is ...
1
vote
1answer
238 views

unexpected end of file error in script file

#!/bin/sh # Host = ############### Port = #### email_id="##################" email_sub="######" # if ping -q -c 5 $Host >/dev/null then result_host="Successful" else result_host="Not ...
1
vote
1answer
96 views

Restoring AIX ufsdump on another Unix system

I've previously tried to restore from an AIX mksysb image (question here). I managed to find another set of nightly AIX backups that look to have been made with ufsdump: # mt -t /dev/rmt/1h rew # dd ...
8
votes
3answers
8k views

Is “sudo su -” considered a bad practice?

Background I know the difference between su -, sudo su -, and sudo <command>: su - - switches user to root, requires the root password sudo su - - switches user to root, requires only the ...
0
votes
0answers
111 views

Restore of AIX backup on other Unix system

I have two old AIX backup tapes box labelled "System Image" that I need to recover a few files from. I've tried to extract them using tar (Solaris and Gnu) and cpio with no success. I then ...
4
votes
1answer
105 views

Can't execute files in particular directories

We are encountering a bizarre issue were non-root users are unable to execute any files (scripts or binaries) in certain directories. This transcript demonstrates the issue: [root@b6 /]# mkdir q ...
1
vote
0answers
31 views

Sendmail is taking huge amount of CPU [duplicate]

My dedicated server is slowing down since 2 days. I checked the RPM and the CPU usage has gone from less than 10% to more than 50%. Rebooting the server didn't help. So, I tried top command: top - ...
1
vote
0answers
29 views

Unix user and group server management solution [closed]

I am looking for a piece of software designed to manage users and groups across several linux platforms. So far all I have come up with is LDAP and a GUI called phpldapadmin. Both seem really dated. ...
5
votes
7answers
13k views

Should I use a login banner and if so, what should it say?

Are interactive login banners worth having? The general consensus is that they are, but what should the banner say? Some things that are being considered (no particular order): ownership of the ...
0
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0answers
28 views

rsync: syncing source folders with deletion, leave existing destination folders alone

I am dealing with the following folder structures on both ends of the rsync: Source Controllers Plugins - Plugin1 - Plugin2 - Plugin3 Models Destination Controllers Plugins - Plugin4 - Plugin5 - ...
0
votes
1answer
358 views

php-fpm does not work me exec or shell_exec

I have OpenBSD 5.6 and php-fpm, nginx. Is chrooted by default on /var/www I try:(test.php) <?php if(function_exists('exec')) { echo "exec is enabled"; }else{ // it's not echo "exec is ...
2
votes
1answer
180 views

Interactive shell based on SSH and UDP [closed]

I've heard from a friend about a client-server application which initializes on top of SSH connection but implements interactive shell over UDP protocol. It is specifically designed for bad quality ...
4
votes
1answer
2k views

How can I start a shell inside a jail on FreeBSD?

I have access to a a previously set up FreeBSD box with a number of jails on it. One of the jails is an SQL server, and does not have ssh enabled on it. How can I gain access to a shell on that jail ...
0
votes
1answer
30 views

BNF diagram for sudo file

How can I generate a (BNF) railroad diagram for /etc/sudoers file? I know the sudoers manpage has Extended Backus-Naur Form informations. Also, there are some tools to generate such diagrams (see ...
9
votes
3answers
11k views

How can I rename an unix user?

I have a user named hedgehog and I want him to be named squirrel, but I don't want to change his numeric user ID. How can I accomplish this?
2
votes
2answers
112 views

AWK + Host lookup

Currently using the following line to get top 20 ips sorted by requests: grep 'GET /' /var/log/nginx/access.log | awk '{ print $1 }' | sort -n | uniq -c | sort -rn | head -20 Output: 575 ...
1
vote
2answers
3k views

Weblogic administration console way too slow

I've installed weblogic 10.3.3, configured simple domain with default configuration. And after starting weblogic I cannot use it via admin console because it is starting too slow (~10 mins). It seems ...
17
votes
4answers
6k views

A better unix find with parallel processing?

The unix find(1) utility is very useful allowing me to perform an action on many files that match certain specifications, e.g. find /dump -type f -name '*.xml' -exec java -jar ProcessFile.jar {} \; ...
0
votes
2answers
142 views

Run a script in /etc/motd [duplicate]

I'd like to run a python script when people log in to the server. I thought editing /etc/motd would be the best approach, but since it's only readable file, that won't work. I found pretty much ...
0
votes
1answer
1k views

How to convert DER formatted public key file to PEM form

I need to use the PEM formatted public key for some purpose, but not finding the command which can convert DER formatted public key to PEM formatted public key. The command I have used - openssl ...
1
vote
1answer
96 views

What rsync options to use for the below mentioned scenario?

Greetings !!! This is regarding a specific requirement about rsync that we are trying to achieve. We have tried to achieve this by using various rsync options. However, we are encountering different ...
0
votes
4answers
5k views
4
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3answers
2k views

ssh still accepts password authentication despite being configured for public-key only authentication (which works!)

I have configured an Ubuntu 10.04LTS desktop install to only allow public key authentication. RESULT: public key authentication works perfectly! QUESTION: The problem is that despite being ...
8
votes
7answers
5k views

In *nix, how to determine which filesystem a particular file is on?

In a generic, modern unix environment (say, GNU/Linux, GNU/Solaris, or Mac OS X), is there a good way to determine which mountpoint and filesystem-type a particular absolute file path is on? I ...
2
votes
4answers
3k views

Unix Snoop Command

Doing testing on a server right now. Both the client and server are on my machine. I am trying to snoop the packets between them but am not having any luck. These are some variations I have tried: ...
3
votes
3answers
9k views

How do I load the dump.rdb file into redis?

I have a dump.rdb file, which is in the same directory as redis.config. When I start my sever: redis-server ./redis.config It does not load the data in that 1 GB file. How do I load that data?
2
votes
2answers
168 views

error: no space left on device when saving file (but there is space)

I am implementing in ruby however when I want to save my work I get "Opening output file: no space left on device, /afs/edu/usr7/ael/p\ rivate/RUBY/inc.rb" When I checked if I got any space using ...
0
votes
1answer
414 views

sftp: get file by mtime

Objective: Connect to sftp server with very simple script using -b option, cd to directory and get file with the latest modified time or created time. I can connect and download *.csv but that may ...
13
votes
6answers
2k views

Building a Linux Network for Our Company - Where Do I Start?

This is going to be a somewhat loaded question. I am programming in a company that has been around since 1962. A lot of things, especially computer / network stuff, is very dated. Let me give a bit ...
0
votes
2answers
122 views

is it possible to combine files system from different servers and present it as one?

I have 3 physical servers (server01, server02 and server03) and local storage. I've created /app file system on all of three servers and mounted the storage there. I need to be able to combine /app ...
0
votes
0answers
56 views

cron job doesn't run under specific account

I have a crontab entry on my RHEL 5.4 system under the "oracle" account but it never seems to actually run. I have the following entry: * * * * * /home/oracle/blahblah.sh > /tmp/test.log ...
2
votes
1answer
66 views

Create a Windows shortcut on Unix [duplicate]

I'm looking for a tool that will allow me to create Windows shortcuts on a Unix (BSD) machine. Can anyone point me to one? Thanks in advance.
1
vote
1answer
119 views

how to run nohup when prompted for password and/or input parameter

I typically use nohup like so: nohup ./myscript.sh 11111 > nohup.out & Where 11111 is an input parameter. In this case, the application is prompting for a password and I'm unable to use ...
4
votes
4answers
9k views

How do I connect to a server behind an socks5 proxy through SSH on mac/linux?

I am using the ssh to try to connect to a server behind on remote network. That server is behind a socks5 proxy on the same network. The port of the proxy server is 1080 and the ssh port is 22. ...
0
votes
1answer
26 views

Not able to restrict the user to particular directory in unix

Below are the steps I performed: I created group sftponly. Added one user named sftpusers to that group. Added Subsystem sftp internal-sftp to file /etc/ssh/sshd_config Added this line to the file ...
0
votes
4answers
3k views

How to remove empty/blank lines in a file in Unix?

How do I remove empty/blank (including spaces only) lines in a file in Unix/Linux using the command line? contents of file.txt Line:Text 1:<blank> 2:AAA 3:<blank> 4:BBB 5:<blank> ...
7
votes
2answers
22k views

In unix/linux, what is the proc directory for? why does it exists? [closed]

In unix/linux, what is the proc directory for? why does it exists? What can I use it for (if not just for the system)?