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  • Limit vsftp upload to a given set of file-names

    - by Chen Levy
    I need to configure an anonymous ftp with upload. Given this requirement I try to lock this server down to the bear minimum. One of the restrictions I wish to impose is to enable the upload of only a given set of file-names. I tried to disallow write permission to the upload folder, and put in it some empty files with write permission: /var/ftp/ [root.root] [drwxr-xr-x] |-- upload/ [root.root] [drwxr-xr-x] | |-- upfile1 [ftp.ftp] [--w-------] | `-- upfile2 [ftp.ftp] [--w-------] `-- download/ [root.root] [drwxr-xr-x] `-- ... But this approach didn't work because when I tried to upload upfile1, it tried to delete and create a new file in its' place, and there is no permissions for that. Is there a way to make this work, or perhaps use a different approach like abusing the deny_file option?

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  • Virtual memory on Linux doesn't add up?

    - by Brendan Long
    I was looking at System Monitor on Linux and noticed that Firefox is using 441 MB of memory, and several other applications are using 274, 257, 232, etc (adding up to over 3 GB of virtual memory). So I switch over to the Resources tab, and it says I'm using 462 MB of memory and not touching swap. I'm confused. What does the virtual memory amount mean then if the programs aren't actually using it. I was thinking maybe memory they've requested but aren't using, but how would the OS know that? I can't think of any "I might need this much memory in the future" function..

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  • Sharing large (multi-Gb) files with clients

    - by Tim Long
    I wasn't sure if this was the best place for this question, but I think it is squarely in the realm of the IT admin so that's the reason I put it here. We need to share large files (several Gigabytes) with external clients. We need a simple way of reliably and automatically publishing these files so that clients can then download them. Our organization has Windows desktops and a Windows SBS 2011 server. Sharing from our server is probably suboptimal from the client's perspective, because of the low upstream bandwidth of typical ADSL (around 1 Mbps) - it would take all day (9 hours for a 4Gb file) for the client to download the file. Uploading to a 3rd party sever is good for the client but painful for us, because we then have to deal with a multi-hour upload. Uploading to a third-part server would be less problematic if it could be made reliable and automatic, e.g. something like a Groove/SharePoint Workspace, simply drop the file in and wait for it to synchronize - but Groove has a 2Gb limit which is not big enough. So ideally I'd like a service with the following attributes: Must work for files of at least 5Gb, preferably 10Gb Once the transfer is started, it must be reliable (i.e. not sensitive to disconnections and service outages) and completely automatic Ideally, the sender would get a notification when the transfer completes. Has to work with Windows based systems. Any suggestions?

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  • Any command line tool checking windows domain password?

    - by Chen Jun
    Does Windows provide a command line utility that lets me check a domain user's password? It is sufficient that the utility returns success(0) if I provide a matching domain user name and password. Alternatively, is there a simple VB/JS script that can do this? I'm the Intranet admin of my company and have the default password set for corporate staff, so I'd like to quickly scan which users have not changed their default password. Better yet, are there any books or websites which cover such topics so that I can get more information?

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  • How to remove a partition on a USB drive?

    - by Nathan Long
    I got a free promotional USB stick that I want to format for my own purposes. When I inserted it, it automatically opened a browser and launched a web site. I have since disabled autoplay on this computer so that nothing launches when the stick is inserted. But it still shows up as two separate drives, and one of them is a "CD Drive" that I can't format. How can a USB stick contain a "CD Drive?" And more to the point, how can I remove this partition using Windows XP or Ubuntu? Update I previously asked for an XP solution, but finding none, I have tried Ubuntu, also without success. Gparted doesn't see the "CD" portion as a device at all, and from bash, any chmod changes I try tell me that the file system is read-only. Any ideas?

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  • ADExplorer, how to search with "distinguishedName contains" condition?

    - by Jimm Chen
    I'm using ADExplorer 1.42 from Microsoft. I'm not very versed at this program so please kindly help me out with a search-related problem. Right click on a node(e.g., CN=NlscanStaff) and select Search Container... , with default search attributes, I can see all objects inside NlscanStaff listed as result. Note that there is a CN=CHJTEST object listed. Now, my question is, how to search for CHJTEST specifically? I tried search condition: Attribute : distinguishedName Relation : contains Value : CN=CHJTEST Click Add , then Search . But no result. Can someone tell me what's going wrong? Thanks.

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  • Some Windows AD user property cannot be changed by AD user himself, what controls it?

    - by Jimm Chen
    I'm curious with a question I find. An Windows Active Directory user can change his own telephone number, street address etc, but can NOT change his own email-address registered on the AD. Using Python+pywin32 I can also verify this behavior. When trying to change own EmailAddress, I got error General access denied error . I'd like to know where in the AD this allow/deny behavior is defined. Thank you.

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  • How does Mac's command line compare to Linux?

    - by Nathan Long
    I love Ubuntu Linux - especially the commmand line. But I have to admit that, at least for now, Windows is more user-friendly - there's more software for it, more drivers, and more stuff just works. Knowing that Mac is built on Unix makes me wonder if it's the sweet spot between them. But I wonder: how similar is the Mac command line to Linux's bash? Could I pick right up with using vim and bash scripting and git, etc? Would common commands like changing directories be different? Does anybody know an online "compare and contrast" resource?

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  • Why is my FTP output file blank?

    - by Nathan Long
    From the Windows command prompt, I have FTPd to a Windows web server. I can get a file, and I can see a directory listing with dir, but I want to save that list locally. I tried dir > c:\somefile.txt, and the file is created, but it's blank. Same thing if I do ls > c:\somefile.txt. The result is the same when I FTP from a Linux box. FTP sends back the following: 200 PORT command successful 150 Opening ASCII mode data connection for /bin/ls 226 Transfer complete

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  • Limit vsftpd upload to a given set of file-names

    - by Chen Levy
    I need to configure an anonymous ftp with upload. Given this requirement I try to lock this server down to the bear minimum. One of the restrictions I wish to impose is to enable the upload of only a given set of file-names. I tried to disallow write permission to the upload folder, and put in it some empty files with write permission: /var/ftp/ [root.root] [drwxr-xr-x] |-- upload/ [root.root] [drwxr-xr-x] | |-- upfile1 [ftp.ftp] [--w-------] | `-- upfile2 [ftp.ftp] [--w-------] `-- download/ [root.root] [drwxr-xr-x] `-- ... But this approach didn't work because when I tried to upload upfile1, it tried to delete and create a new file in its' place, and there is no permissions for that. Is there a way to make this work, or perhaps use a different approach like abusing the deny_file option?

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  • How can user change the jre parameter values after the exe is generated in Launch4j?

    - by Wing C. Chen
    Is it possible to change the jre parameter values after the exe file is generated through Launch4j? The ideal scenario is like this: The default parameter values are applied when the program is started. However, when the user wants to change some jre parameter values, he goes to a .ini file, MyProgram.ini for example, changes the values there, and the new values will be applied next time the program is started. I think eclipse uses the same way for its memory and some other parameter settings.

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  • Recovering data from mangodb raw files

    - by Jin Chen
    we use mongodb for our database and set the replset(two servers), but we mistakenly deleted some raw files that under /path/to/dbdata on both servers, after we used tool to get back the deleted files(we ran the extundelete on both server and mix the result together), like database.1, database.2 etc. we could not start the mongod, it raised the following error when starting mongod or executing mongodump, here is the console output: root@mongod:/opt/mongodb# mongodump --repair --dbpath /opt/mongodb -d database_production Thu Aug 21 16:22:43.258 [tools] warning: repair is a work in progress Thu Aug 21 16:22:43.258 [tools] going to try and recover data from: database_production Thu Aug 21 16:22:43.262 [tools] Assertion failure isOk() src/mongo/db/pdfile.h 392 0xde1b01 0xda42fd 0x8ae325 0x8ac492 0x8bd8e0 0x8c1c51 0x80e345 0x80e607 0x80e6a4 0x6db92a 0x6dc1ff 0x6e0db9 0xd9e45e 0x6ccdc7 0x7f499d856ead 0x6ccc29 mongodump(_ZN5mongo15printStackTraceERSo+0x21) [0xde1b01] mongodump(_ZN5mongo12verifyFailedEPKcS1_j+0xfd) [0xda42fd] mongodump(_ZNK5mongo7Forward4nextERKNS_7DiskLocE+0x1a5) [0x8ae325] mongodump(_ZN5mongo11BasicCursor7advanceEv+0x82) [0x8ac492] mongodump(_ZN5mongo8Database19clearTmpCollectionsEv+0x160) [0x8bd8e0] mongodump(_ZN5mongo14DatabaseHolder11getOrCreateERKSsS2_Rb+0x7b1) [0x8c1c51] mongodump(_ZN5mongo6Client7Context11_finishInitEv+0x65) [0x80e345] mongodump(_ZN5mongo6Client7ContextC1ERKSsS3_b+0x87) [0x80e607] mongodump(ZN5mongo6Client12WriteContextC1ERKSsS3+0x54) [0x80e6a4] mongodump(_ZN4Dump7_repairESs+0x3a) [0x6db92a] mongodump(_ZN4Dump6repairEv+0x2df) [0x6dc1ff] mongodump(_ZN4Dump3runEv+0x1b9) [0x6e0db9] mongodump(_ZN5mongo4Tool4mainEiPPc+0x13de) [0xd9e45e] mongodump(main+0x37) [0x6ccdc7] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xfd) [0x7f499d856ead] mongodump(__gxx_personality_v0+0x471) [0x6ccc29] assertion: 0 assertion src/mongo/db/pdfile.h:392 Thu Aug 21 16:22:43.271 dbexit: Thu Aug 21 16:22:43.271 [tools] shutdown: going to close listening sockets... Thu Aug 21 16:22:43.271 [tools] shutdown: going to flush diaglog... Thu Aug 21 16:22:43.271 [tools] shutdown: going to close sockets... Thu Aug 21 16:22:43.272 [tools] shutdown: waiting for fs preallocator... Thu Aug 21 16:22:43.272 [tools] shutdown: closing all files... Thu Aug 21 16:22:43.273 [tools] closeAllFiles() finished Thu Aug 21 16:22:43.273 [tools] shutdown: removing fs lock... Thu Aug 21 16:22:43.273 dbexit: really exiting now my env: 1) Debian 3.2.35-2 x86_64(it's a XEN virtual machine) 2) mongodb 2.4.6 and we did not delete the .0 and .ns files we tried to create a new database with the same name and copy these db.ns and db.2, db.3 to the new db, we still met the same error. is there any way to check the valid of raw .ns and datafiles, and how to recover the database?

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  • setting up rhel 5.x RPM build server for mortal users

    - by Chen Levy
    My task is to setup a RHEL 5.x build host, that can build RPMs for mortal users. On RHEL 6.x with rpm version 4.8, I have in /usr/lib/macros: # Path to top of build area. %_topdir %{getenv:HOME}/rpmbuild On RHEL 5.x with rpm version 4.4, the %{getevn:HOME} is not available. I know that I can use /home/someuser/.rpmmacros: %_topdir /home/someuser/rpmbuild and this will work for that user, however I don't want to do this for every user separately. Moreover, since .rpmmacro will not expand ${HOME} or ~ I suspect it is unsafe to use those. This in turn make /etc/skel unstable for this task (or so I suspect). So in short, my question is: How to setup RHEL 5.x host that allow all users to build RPM packages in their home directory?

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  • Windows 8 with LiveID login authenticates as Guest to remote SQl Server

    - by Tim Long
    I have a network where several users are using Office Accounting 2009 in multi-user client/server mode. OA is built on SQL Server. One PC acts as the 'server' and has the SQl Server instance, the others have only the application installed and no SQL instance, all of the apps connect remotely to the SQL instance on the 'server'. I'm using the term 'server' loosely here, it is just a normal workstation that happens to be designated as the server and runs the SQL instance. There is no NT domain, all user accounts are local accounts. The way that OA works in multi-user mode is that each user is required to have a local account with the same username and password on both the client and 'server' PCs. This has been working well, no along comes Windows 8. I use my 'Microsoft Account' aka LiveID to log into Windows 8. Office Accounting runs fine and attempts to connect to the database, but fails, 'you do not have permission to perform this operation'. In the SQL logs, I get this error: 2012-10-28 17:54:01.32 Logon Error: 18456, Severity: 14, State: 11. 2012-10-28 17:54:01.32 Logon Login failed for user 'SERVER\Guest'. Reason: Token-based server access validation failed with an infrastructure SERVER is the hostname of the server. So it seems to be authenticating as 'Guest'?? To verify this, I enabled the Guest account on the 'server' PC and then added Guest as an allowed user within Office Accounting (this simply creates the user in SQL and gives it an appropriate database role). Sure enough, My Windows 8 PC was then able to connect to the database when using Office Accounting. Clearly, having users authenticate as 'Guest' stinks from a security and auditing standpoint. So what I need are some ideas for how to work around this. I've tried switching the Windows 8 PC to a 'local account' and that works too, but requires giving up significant functionality on the Windows 8 PC. What I really need is a way to force the Windows 8 PC to use a specific set of credentials when connecting to the remote SQL instance. Office Accounting takes the logged in username, which is my LiveID and doesn't correspond to any Windows user name. Anyone solved this issue?

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  • PowerPoint avoid animation completion on click & advance slide or start new one

    - by ScottS
    Scenario I have PowerPoint 2010 On the "Transitions" tab the "Advance Slide On Mouse Click" check box is checked. I have a long, slow, timed, non-repeating animation working in the background of the slide. I click to advance the slide before the animation is finished, but ... Instead of advancing the slide, the animation moves to the completed state ... Forcing a second click to actually advance the slide. Additionally If I have other animations on the slide that are initiated by a click, the long animation also advances to a finished state before starting the new animation. Desired Behavior On click, I want the slide to advance or the next on-click animation to start whether the long animation is done or not, and without having that long animation first "complete" itself. In the case of another animation, I simply want the long animation to continue, while also doing the new animation. Ultimate Question Is there a way to either: Set an option somewhere to not have that animation complete on click and simply "continue" to animate with the start of a new animation or to advance the slide (as the case may be)? Create a VBA script that will produce the desired behavior for the long animation?

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  • Does MySQL log successful or attempted queries?

    - by Nathan Long
    I'm trying to track down a hit-or-miss bug in a web application. Sometimes a request completes just fine; sometimes it hangs and never finishes. I see that Apache now has several requests listed on the server-status page as "sending reply," and that doesn't change. I'm testing on localhost, so there shouldn't ever be more than one. Out of curiosity, I set MySQL to log all queries and I'm tail -fing the log file. When things go OK, I see a pattern like this: 20 Connect root@localhost on dbname 20 Query (some query #1) 20 Query (some query #2) (etc) 20 Quit 21 Connect (etc) When it hangs, I see a pattern like this: 22 Connect root@localhost on dbname 22 Query (some query #1) //nothing happens, so I try the post again 23 Connect root@localhost on dbname 23 Query (some query #1) //nothing happens; try again 24 Connect (etc) Here's my question: is MySQL logging attempted queries, or successful queries? In other words, if the last line I see is query #1, does that imply that query #1 or query #2 is hanging? My guess is that the one I don't see is the problem, because the last one I see looks fine, but maybe the one I don't see is too screwed-up for MySQL to process. Thoughts?

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  • Can ZenOSS integrate Ganglia smoothly?

    - by chen
    I like Ganglia for its Gmetric function, and I like its multi-layer capability. But Ganglia does not have healthiness check, alerting and etc. for the server monitor functionality. So it would be great to bring this two species together. Sure, we can install Ganglia, and then install ZenOSS. But is there a plugin or something that can smoothly integrate them together? At least integration at the presentation level. Thanks

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  • Unable to force Debian to do unattended install... libc6 wants interactive confirm

    - by JD Long
    I'm trying to create a script that forces a Debian Lenny install to install the latest version of CRAN R. During the install it appears libc6 is upgraded and the install wants interactive confirm that it's OK to restart three services (mysql, exim4, cron). This process HAS to be unattended as it runs on Amazon's Elastic Map Reduce (EMR) machines. But I'm running out of options. Here's a few things I've tried: This previous question appears to be exactly what I'm looking for. So I set up my install script as follows: # set my CRAN repos... yes, I know there's a new convention where to put these. echo "deb http://cran.r-project.org/bin/linux/debian lenny-cran/" | sudo tee -a /etc/apt/sources.list echo "deb-src http://cran.r-project.org/bin/linux/debian lenny-cran/" | sudo tee -a /etc/apt/sources.list # set the dpkg.cfg options per the previous SuperUser question echo "force-confold" | sudo tee -a /etc/dpkg/dpkg.cfg echo "force-confdef" | sudo tee -a /etc/dpkg/dpkg.cfg export DEBIAN_FRONTEND=noninteractive # add key to keyring so it doesn't complain gpg --keyserver pgp.mit.edu --recv-key 381BA480 gpg -a --export 381BA480 > jranke_cran.asc sudo apt-key add jranke_cran.asc sudo apt-get update # install the latest R sudo apt-get install --yes --force-yes r-base But this script hangs with the following request for input: OK, so I tried stopping the services using the following script: sudo /etc/init.d/mysql stop sudo /etc/init.d/exim4 stop sudo /etc/init.d/cron stop sudo apt-get install --yes --force-yes libc6 This does not work and the interactive screen comes back, but this time with only cron listed as the service that must be restarted. So is there a way to make libc6 just restart these services with no user input? Or is there a way to stop cron so it does not cause an interactive prompt? Maybe a creative option I've never thought of? Keep in mind that this system is brought up, some Hadoop code is run, and then it's torn down. So I can put up with side effects and bad behavior that we might not want in a production desktop machine or web server.

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  • Thoughts on Apache log file sizes?

    - by Nathan Long
    Do you place any limits on the size of Apache log files - access.log and error.log? Specifically, can you give: Reasons to limit log file sizes Disk space Any other? Reasons NOT to limit log file sizes Research into performance issues or security breaches Any other? Methods of doing so Cron job that periodically deletes the file, or the first N lines? Any other? Anything you might salvage before deleting For example, grep out how many times a file was downloaded before deleting the access logs I'd like get the thoughts of experienced sysadmins before I do anything. (Marking as community wiki since this may be a matter of opinion.)

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  • Is there a sensible way of 'teaming' two ADSL connections?

    - by Tim Long
    I work in an office complex that has two seperate ADSL connections, which they use to provide two seperate networks (actually both the ADSL routers go into a Cisco managed switch with two VLANs, one for each ADSL connection). Circumstances have changed so that 95% of the users are all on one ADSL connection. It would be great if there were a way to join together both connections to emulate a single connection at double the speed, but the ISP doesn't support bonding. So, is there a sensible way to take two completely seperate ADSL lines and use them to provide a single internet gateway?

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  • Any program to help me check whether an ethernet channel can support full-length VLAN packet?

    - by Jimm Chen
    Sometimes, I have to face such a situation that I need to quickly and explicitly know whether a full length VLAN packet can traverse between two RJ45 ports. Yes, I mean 802.1Q ethernet frame with Etype=81 00 (diagram below). What I can do now is: Get two Windows PCs, for each PC, intall Intel Gigabit NIC and Intel specific driver to create a virtual NIC, with VLAN ID=3 assigned. Then connect the two PCs to each of the two RJ45 port. Finally execute ping to generate a full-length ethernet packet. ping -f -l 1472 <dest-IP> This way, I can be sure that the sent packet has the maximum "IP data payload" of 1500 bytes(8 bytes of ICMP header and 1472 bytes of ICMP data). If the ping gets reply, I know that the ethernet channel support full-length VLAN packet. From my experiment, some home switch or broad band routers(e.g. Linksys WRT54G) does not support full-length VLAN packet switching, so only ping -f -l 1468 succeeds. You see, I have to use an expensive Intel NIC to carry on that test, quite inconvenient. You know, for most laptop today, they do not equip an Intel NIC, and, even it is an Intel NIC, Intel VLAN driver, Intel has limitations on the models on which VLAN driver can be installed. So, my question is: Is there a small program that can let me send a full-length VLAN packet without installing a dedicated VLAN driver? Or better, the program has a stock feature that does the very job for my situation. Windows programs preferred, Linux solution welcome. Simpler the program, the better. Thank you.

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  • How to search for one of two similar strings in Vim?

    - by Nathan Long
    This is a pretty simple regex question, I think. In Vim, if I want do a search that matches planA or planB, I know that I can do this: /plan[AB] This works because the regex allows for either A or B as its set of characters. But how can I specify one of two complete strings? For example, to match both planetAwesome and planetTerrible, this doesn't work: planet[Awesome|Terrible] ... because it's looking for planetA or planetw or planete, etc. Nor does this: planet['Awesome'|'Terrible'] This will match both of these, along with planetAnythingHereAsLongAsItsJustLetters: planet\([a-zA-Z]*\) But how can I match only strings that match planetAwesome or planetTerrible exactly?

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  • Modifying the initrd.img to run additional binaries in a PXE booted RHEL 6

    - by Charles Long
    I am trying to add additional automation to our existing RHEL 6 (or Oralce's implementation thereof) PXE install process by running a script in the %pre section of my kickstart config that call hpacucli, HP's raid device configuration binary. My approach has been to modify the PXE served initrd.img. I've unpacked the initrd.img and copied in the required libraries, binaries, and scripts but when the system boots using the modified initrd.img, the modified /lib (and /lib_64) are moved aside to /lib_old and /lib is linked to the /mnt/runtime/lib. How can I change this configuration so that the /lib is not moved (unlikely) or required libraries are available in the runtime /mnt/runtime/lib? To test and confirm this I've been able to get the install process to move to the 6th virtual console, which allows me to see errors, and then open a shell (a useful debugging mechanism). %pre exec /dev/tty6 2 /dev/tty6 chvt 6 /bin/sh

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