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  • Port forwarding using IP Tables

    - by Darider
    I have a server with a LAN facing address of 192.168.5.100 (eth0) and another LAN facing address of 192.168.6.6 (eth1). On this server I have a Virtualbox instance of fedora running an apache webserver (on port 8080) with a bridged interface to eth1 on the host server with address of 192.168.6.7 Users on the 192.168.6.x network can access the Webserver on the Vbox instance (192.168.6.7) with no problems. My question is what kind of iptables entries or commands should be made/executed so as to allow for users on the 192.168.5.x network to access the webserver on the vbox instance. (I'm hoping their url can be something like: http://192.168.5.100:8080)

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  • Access denied for user 'root@localhost' (using password:NO)

    - by murgatroid99
    I am attempting to install a network management package called cacti onto Ubuntu running under Windows Virtual PC. I attempted to install MySQL as it is one of cacti's dependencies. I can install and start the MySQL server, but whenever I try to access it in any other way, such as to change the password, I get the error message Access denied for user 'root@localhost' (using password:NO). I would like to know what is causing this and how to fix it. Edit: (just in case my comments are not visible) The answers from HD and Devin Ceartas did not work for me.

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  • Automate hashing for each file in a folder?

    - by Kennie R.
    I have quite a few FTP folders, and I add a few each month and prefer to leave some sort of method of verifying their integrity, for example the files MD5SUMS, SHA256SUMS, ... which I could create using a script. Take for example: find ./ -type f -exec md5sum $1 {} \; This works fine, but when I run it each time for each shaxxx sum afterwards, it creates a sum of the MD5SUMs file which is really not wanted. Is there a simpler way, or script, or common way of hashing all the files in to their sums file without causing problems like that? I could really use a better option.

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  • Why doesn't the value in /proc/meminfo seem to map exactly to the system RAM?

    - by Eric Asberry
    The values in /proc/meminfo for MemTotal don't make sense. As a human, eyeballing it, it seems to roughly correspond to the installed RAM, but for using it to display the installed RAM from an automated utility it appears to be inexact, and inconsistent. For a system with 1G of RAM, I would expect the MemTotal line to have a value of 1048576 - 1024*1024. But instead, I'm seeing 1029392. On another 4G box, I'm seeing 3870172, which is not a multiple of 1024, and it's not even close to 1029392*4. On an 8G box, I get 8128204, which again seems to have no correlation to the other values, nor is it a multiple of 1024. I'm trying to use this information to report the RAM on a status web page. My work-around is to just "round" it to the nearest 1G multiple, but I'd like to understand why these values seem inconsistent and don't match my expectations. Can somebody fill me in on what I'm missing here? EDIT: To expand on the accepted answer below.... The reference can be found here. Also of interest to me from that page, which explains the inconsistency, is this bit: meminfo: Provides information about distribution and utilization of memory. This varies by architecture and compile options. ...

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  • Accessing large log files on a unix machine with textpad

    - by Jason
    Hi, I'm interested to access large log files on a unix server with textpad. (textpad for history reasons, i personally prefer ofcourse less awk grep etc) but I have many personal who rather be using textpad they have years of experience with it and can tweak it to do whatever they want. The problem is that if i connect for example with winscp to get the log files to textpad it first fetches the full log and user needs to wait and it bloats etc. I would rather the textpad to somehow access the unix machine and get only the relevant segment of the log file (large log files could be GB) anyone knows how can this be achieved?

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  • What is excessive swapping.

    - by amateur barista
    This post led me to ask that question. Cache contention On a large site, if you are using MyISAM, contention occurs in the database tables when the cache is forced to clear after a node or a comment is added. With tens of thousands of filter text snippets needing to be deleted, the table will be locked for a long period, and any accesses to it will be queued pending the purge of the data in it. The same is true for the page cache as well. This often causes a "site hang" for a minute or two. During that time new requests keep piling up, and if you do not have the MaxClients parameter in Apache setup correctly, the system can go into thrashing because of excessive swapping.

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  • Should we regularly schedule mysqlcheck (or databsae optimization)

    - by scatteredbomb
    We run a forum with some 2 million posts and I've noticed that if left untouched the overhead in the mySQL (as listed in phpMyAdmin) can get quite large (hundreds of megabytes). I'm wondering if scheduling a normal mysqlcheck to optimize the tables is good practice? Any reason not to do it, say, once a week at an off-peak hour? There was a time over the summer where our site was constantly crashing because mysql was using up all resources. That's when I noticed the huge amount of overhead and optimized the database and haven't had any problems since then with stability. I figured if that was helping alleviate the issues, I should just setup a cron to automatically do this.

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  • how to know which display number for the variable DISPLAY to be exported when ssh to server

    - by insidepower
    When i ssh to server using -X, i always confuse about which display number i should export. It seems to me sometimes the display number has been used by something, so what i can do is only export DISPLAY=localhost:0 && xclock export DISPLAY=localhost:1 && xclock export DISPLAY=localhost:2 && xclock export DISPLAY=localhost:... until the clock appear. Then i will use that display number. Each time log in to the server, the display number which is able to tunnel the gui data correct would be different. I know many of such similar questions has been asked and answer. However I couldn't find answer to my question, anyone know about it? Thanks!

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  • What is the easiest way to make a backup of an entire hard disk

    - by Solignis
    Hi there, I got myself a dell laptop from the local computer store. Its a used machine with Windows Vista Home Basic on it. I want to load Ubuntu Desktop 10.10 though so I can do perl development. BUT I want to keep a copy of the entire harddrive with the dell utility partition and Windows Vista in case I want to go back. I was thinking I could image the drive but I not sure what to use, I don't have Ghost or anything, Someone had told me about Clonezilla. Would that work for me? Is it hard to use? Also I want to burn the data to a DVD or something more storable than a harddisk.

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  • What is the easiest way to make a backup of an entire hard disk

    - by Solignis
    Hi there, I got myself a dell laptop from the local computer store. Its a used machine with Windows Vista Home Basic on it. I want to load Ubuntu Desktop 10.10 though so I can do perl development. BUT I want to keep a copy of the entire harddrive with the dell utility partition and Windows Vista in case I want to go back. I was thinking I could image the drive but I not sure what to use, I don't have Ghost or anything, Someone had told me about Clonezilla. Would that work for me? Is it hard to use? Also I want to burn the data to a DVD or something more storable than a harddisk.

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  • Installing multiple versions of a shared library

    - by nsfyn55
    I am running ubuntu 10.04 and I want to use tmux 1.6. tmux has a dependency on libevent 2. My solution was to compile libevent2 and drop into /usr/local/lib then compile tmux against this lib and drop into /usr/local/bin. This works great until...I restart. This is just an assumption on my part but it seems that other binaries are now linking to the libevent2 library presumably because its on the library path. Because there are 60+ packages with libevent1 dependencies this causes my install to basically lose its mind. Is there an idiomatic way to approach running an application that has a core library dependency on a different version? Should I just statically link the lib?

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  • Stopping immediate right button up in Mint 13 (Cinnamon) actioning first menu choice

    - by jontyc
    In Windows, a single right click (i.e., with release) displays a context menu on the screen, allowing you to select the appropriate choice with a further click from either button. In Mint 13, Cinnamon, it's hold down the right button, drag, then release on the appropriate menu choice. Both methods are fine, but constantly using both OSs regularly, I'm doing the Windows procedure in Mint by mistake all the time. This makes the single right click and release bring up the context menu and immediately action the first menu choice. Is there any mechanism to ignore right-button-up if a substantial dragging action or time period hasn't occurred, and have Mint looking for a further click to select?

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  • Avoid putty ssh terminal to crash when disconnecting from server

    - by JBoy
    I'm connecting via ssh to a remote 'live' server where i have some bash scripts automated via the crontab, when an error happens in some of the automation scripts within the server, the connection to the server is killed, this is fine to me, but the problem is that Putty closes the entire window, which is a behavior i don't want. I have checked all around the web, unfortunately the putty site does not have a support page, but nothing. Under putty's option i have tried all the menus expanding all options, but still i cant find the right one, i would expect it to be under Windowbehaviour Do you have an advice? Thx

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  • Different behaviour of script locally and over ssh

    - by neorg
    I have a script on a server-A Script-A #!/bin/bash -l echo "script-A.sh" | change-environment.sh When I ssh onto server-A and execute it, it works fine. However, when I ssh user@server-A ./script-A.sh Script-A executes, but throws an undefined variable error in change-environment.sh. change-environment.sh runs in the c shell(I have no control over the script so the method I have used is about the only way I can use it), but everything else is in bash. Had found a similar question at I can run a script locally, but cannot do "ssh HOSTNAME /path/to/script.sh". However, there was no solution to the issue and it was a year old.

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  • KDE Device Notifier and mounted volumes ownership and permissions

    - by nunomaltez
    Hi, When I plug an USB pen to my PC and mount the device using KDE's Device Notifier, the mounted device is owned by my user, who has write permissions. However, when I connect a USB harddisk and mount a partition in the same way, the mounted device is owned by root, and since the owner is the only one with write permissions I can't write to the disk. How do I configure the device notifier's actions to mount the HD with my user as owner, just like it mounts the USB pen? I'm using Fedora 9.

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  • What's the most compact way to store a password-protected RSA key?

    - by Tim
    I've tried converting a PEM-encoded key to DER format, and it appears the password is stripped regardless of the -passout argument. Example: openssl rsa -in tmp.pem -outform DER -out tmp.der -passin pass:foo -passout pass:bar -des3 The resulting key appears no longer password-protected, so I am assuming that DER format does not support a password - is that correct? What alternative way is there to store this in a compact, binary form, and keep the password-protection?

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  • Compiz and Desktop Effects on Netbook with External Monitor

    - by Nerdfest
    I have an Acer Aspire One AO150 and am having trouble plugging in an external monitor under Ubuntu 9.10. There were no problems under 9.04. If I plug in an external monitor once the machine is already up, then bring up the 'display' application to activate it, it basically hangs. There are no problem under these circumstances if I have desktop effects turned off. I've seen a few mentions of this problem on the Ubuntu forums, but never a solid solution. Any ideas? A few more details after a question below. The machine does not respond to its keyboard commands to switch to an external monitor, nor does it respond to Ctrl-Alt-F1, etc to switch out of X. The pointer is visible on the monitors (at the edge of each) and is frozen as a 'busy' cursor, but with no animation. The kernel does respond to SysReq commands (REISUB). In the latest attempt I had the external monitor active earlier, then removed it and activated desktop effects. Upon plugging in the eternal monitor then bringing up the display application, it hangs.

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  • "No such file or directory"?

    - by user1509541
    Ok, so I have a VDS laying around, and I thought I would turn it into a TF2 game server. When I connect to my server through PuTTY, and use wget to download the package "hldsupdatetool.bin" from Steampowered.com. I go to run it and it says "No such file or directory found". When I use "ls" to see what files are in directory, it lists "hldsupdatetool.bin" as being in the directory. So, why is it saying it's not there? This has been a headache for the past 2 days. It's returning: root@10004:~# wget http://www.steampowered.com/download/hldsupdatetool.bin --2012-07-08 06:04:49-- http://www.steampowered.com/download/hldsupdatetool.bin Resolving www.steampowered.com... 208.64.202.68 Connecting to www.steampowered.com|208.64.202.68|:80... connected. HTTP request sent, awaiting response... 200 OK Length: 3513408 (3.4M) [application/octet-stream] Saving to: “hldsupdatetool.bin.3” 100%[======================================>] 3,513,408 2.45M/s in 1.4s 2012-07-08 06:04:51 (2.45 MB/s) - “hldsupdatetool.bin.3” saved [3513408/3513408] root@10004:~# chmod +x hldsupdatetool.bin.3 root@10004:~# ./hldsupdatetool.bin.3 -bash: ./hldsupdatetool.bin.3: No such file or directory root@10004:~# More: root@10004:~# ls ffmpeg-packages hldsupdatetool.bin.1 hldsupdatetool.bin.3 hldsupdatetool.bin hldsupdatetool.bin.2 setup.sh root@10004:~# ls -la total 13828 drwx------ 4 root root 4096 Jul 8 06:04 . drwxr-xr-x 21 root root 4096 Jul 8 05:57 .. -rw------- 1 root root 8799 Jul 8 06:26 .bash_history -rw-r--r-- 1 root root 570 Jan 31 2010 .bashrc -rw-r--r-- 1 root root 4 Jul 2 19:39 .custombuild drwxr-xr-x 2 root root 4096 Jul 4 18:49 ffmpeg-packages ---x--xrwx 1 root root 3513408 Sep 2 2005 hldsupdatetool.bin -rwxr-xr-x 1 root root 3513408 Sep 2 2005 hldsupdatetool.bin.1 -rw-r--r-- 1 root root 3513408 Sep 2 2005 hldsupdatetool.bin.2 -rwxr-xr-x 1 root root 3513408 Sep 2 2005 hldsupdatetool.bin.3 -rw-r--r-- 1 root root 140 Nov 19 2007 .profile -rw------- 1 root root 1024 Jul 2 19:49 .rnd -rwxr-xr-x 1 root root 38866 May 23 22:02 setup.sh drwxr-xr-x 2 root root 4096 Jul 2 19:44 .ssh root@10004:~#

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  • Why would the Apache parent process restart silently?

    - by miracle
    I run apache 2.2.9 with mpm prefork on debian lenny. Following http://httpd.apache.org/docs/2.2/mod/prefork.html, I would expect that there is one parent process, running as root and listening as configured, which would start child processes as defined by the Min/Max/etc. directives. I expect the children to be restarted as per MaxRequestsPerChild, but the parent process to stay put with one process id until I restart it manually. Out of a little paranoia, I started monitoring listening ports including process ids. I have a cron job every 20 minutes to run netstat -ap | grep LISTEN and diff the output. Sometimes (about once per day) I see a series of this: 8c8 < tcp6 0 0 [::]:www [::]:* LISTEN 6194/apache2 --- tcp6 0 0 [::]:www [::]:* LISTEN 6607/apache2 10c10 < tcp6 0 0 [::]:https [::]:* LISTEN 6194/apache2 --- tcp6 0 0 [::]:https [::]:* LISTEN 6607/apache2 Over a period of an hour or three, the parent would change its pid at least once every 20 minutes, without any explanation in the log files or any other hint that anything is going wrong. This is not what I expected. What am I missing?

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  • What alternative is there to Nginx that supports http keep-alive between backends ?

    - by felace
    Hi. I recently asked a question about how to keep a backend connection persistent using Nginx, but found out it wasn't possible anyway, It is an HTTP/1.0 proxy without the ability for keep-alive requests yet. (As a result, backend connections are created and destroyed on every request.) It works all fine right now (since the connection between client and Nginx is kept alive and the result is simply the same), but I don't want to establish a new connection every single time a new request is received ,even if it's on a unix domain socket. So, what software (preferably open-source and not too tedious to configure) do you recommend to accomplish that such connections ?

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  • rsync invocation to replace symlinks pointing to source?

    - by bdbaddog
    Currently I'm moving a big filesystem to a new server as the original fileserver is no longer able to handle the filesystem writes. To make this quick I made symlinks at the target filesystem pointing to the original filesystem. Initially: /company/release (mountpoint of the original filesystem) After migration: /company/release.old (points to original filesystem after automount map update) /company/release (points to new fileserver/filesystem after automount map update) In /company/release there are symlinks like the following: /company/release/product-1.0.tar.gz - /company/release.old/product-1.0.tar.gz /company/release/product-1.0 - /company/release.old/product-1.0 (this is a tree of files) Using symlinks allowed me to move the writes to the new filesystem quickly. Now I'd like to slowly migrate the existing files and directories to the new filesystem. The problem I'm running into is that since the symlinks point back at the original files rsync doesn't see any difference and so it doesn't actually copy the file(s) or directory(s) and remove/overwrite the symlinks. Is there a set of rsync flags which will do what I want?

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  • Help with user login on Centos 5.6

    - by Owen
    I added a user for the sole purpose of using SU for root. I did not allow the creation of a home directory when creating the user. So now when I login as this user I get the following: Could not chdir to home directory /home/MYUSERNAME: No such file or directory Couldn't resolve homedir for current user at - line 0 BEGIN failed--compilation aborted. Couldn't resolve homedir for current user at - line 0 BEGIN failed--compilation aborted. Is this an error, and if so how do I fix it so it is not looking to "resolve" the homedir?

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