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• Adding a trigger command to autocomplete function in zsh

  - by mkaito

  When you define an alias like alias g=git, the shell will pick it up and run the corresponding autocomplete function. Now, there's a program out there called hub, which is basically a supserset of git, with some added, github-specific functionality. The recommended way to use hub is to alias git=hub. Of course, this won't trigger the autocomplete function for git, which makes sense. Now, if I wanted to have git's autocomplete trigger for hub, the only way I know of is editing /usr/share/zsh/functions/Completion/Unix/_git and adding hub in the first line as trigger. While this works, it isn't practical, since this file will get overwritten with the next zsh release. Assuming hub won't provide a zsh completion function any time soon, is there another way of adding hub to the trigger commands for git's autocomplete function?

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• Vista laptop won't connect to airport extreme

  - by Hutch

  Our previous router died, and to replace it I procured an apple airport extreme. My mac, my wrt54gs (with ddwrt acting as a bridge) and a linux machine have had no problem connecting to the wireless. None of the wired clients are having a problem obviously. The problem is one of my roommates can not connect. That's not strictly true. He can connect to the network, and will, infact, get a dhcp lease. However he cannot get any packets out. Can't ping the router, can't access any web sites, nothing. However he's fine if we switch to an unsecured network. Which is obviously not acceptable. The airport only allows for 'wpa/wpa2 personal' and 'wpa2 personal' (and of course the enterprise versions there of) I keep reading about this problem in multiple spots on the web, but never see any actual answers... Anyway the laptop: hp/compaq cq50-215nr vista home premium wireess card: atheros 5007 airport is simultaneos dualband II

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• Lock System when certain hardware is removed

  - by er4z0r

  Hi all, I am working at a company where you are suppused to lock your screen whenever you leave your desk alone for a few minutes. Now I wondered if there is a nifty little tool that would lock my screen once a certain device is removed from the system. The ideal thing would of course be to have a short-range transmitter that causes the screen to be locked once it goes out of range. But for now I would also stick with removing a pen-drive from my laptop. I am pretty sure this is feasible. I just wan't to know if there are any preexistent projects.

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• What configuration management solutions exist in a non-networked environment?

  - by Rob Spieldenner

  My servers exist in an environment without outside network connectivity (this is a requirement), so when I deploy updates all packages, binaries, config files, etc. must be included on the delivered media. And of course I want some sort of configuration management so I can tell what has and hasn't been installed. So I was wondering if people had experience with chef, puppet, or another configuration management type tool for dealing with this type of environment. Worst case I deploy my updates as an RPM. EDIT: My setup has both Linux servers and Windows servers.

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• Why does Tomcat try to use the cache when compilation failed?

  - by etheros

  For some reason, it appears Tomcat is trying to hit its compilation cache when compilation failed. For example, if I create a JSP containing nothing but Hello, <%=world%>!, predictably, I get an error: org.apache.jasper.JasperException: Unable to compile class for JSP. Subsequent requests however alternate between this and org.apache.jasper.JasperException: org.apache.jasper.JasperException: Unable to load class for JSP. Further, if I create a JSP containing Hello!, it of course works just fine. If I modify it contain Hello, <%=name%>!, the response alternates between the previously-mentioned compilation error, and the cached Hello!. What's going on?

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• Juniper SRX1400 VPN

  - by ank

  I have been trying to set up a client VPN on a Juniper SRX1400 without much success. All documentation I found from Juniper and elsewhere does a lot of other (difficult and wonderful) things other than the simple things I want to do. We already have a VPN running on CISCO PIX hardware which we need to put to rest and we pretty much like to replicate the functionality, which is: 1) client makes a request to the outside interface of the SRX1400, 2) client gets authenticated, 3) if successful, then client is assigned all the usual DHCP stuff and becomes part of the network. What privileges this DHCP assigned network has, should be configurable of course with the usual routing/filtering methods. Am I asking for too much from the SRX for this kind of thing? Should I ditch the SRX for VPN and revert to an OpenVPN solution that I had working some time back also and was amazed at the ease of configuration, functionality and features?

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• Drive Shows No Files But Half Space Gone

  - by Chance Robertson

  I have a 500 GB USB drive. When I go to Windows Explorer or Finder, the drive shows that about half the drive is free. However, when I open either drive in Windows 7 or OS X, no files how up. I have tried to look at the files through the command line and nothing shows. A while back, I hooked it up to my MacBookPro and there was a quick message that said the drive was not ejected properly, blah, blah. And of course I did not read the message and hit OK. It there any way to get back my files from the drive?

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• How to find out the reason why a scheduled task hang?

  - by Graviton

  I have scheduled quite a number of tasks in my Windows 7, doing a variety of cron jobs on my machines. I am perfectly sure that these tasks, when run on their own, won't hang. But the problem is that, when I run them daily, over the course of several days and weeks and months, occasionally some of them will hang. So I am forced to kill the hanged task and rerun it--- and now it can run successfully! I want to fix this problem once and for all, and for that, I need to know why a scheduled task will hang, even when I run it separately, it won't. Anyway for me to find out the reason?

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• vPopmail / xinetd.

  - by Lorren Biffin

  I'm attempting to setup vpopmail on my CentOS server (Media Temple). Everything is working like a charm, with the exception that I cannot login to the server from any pop3 client. Upon trying to login I get the following error: Sending of password did not succeed. Mail server mail.(mydomain).com responded: Login failed. I'm running qmail (of course) with xinetd (not tcpserver). I've placed a file called pop3 into the folder /etc/xinetd.d with the content: service pop3 { disable = no socket_type = stream protocol = tcp wait = no user = root server = /var/qmail/bin/qmail-popup server_args = mail.(mydomain).com /home/vpopmail/bin/vchkpw /var/qmail/bin/qmail-pop3d Maildir log_type = FILE /var/log/xinetd.log log_on_success = HOST log_on_failure = HOST RECORD } Can anybody offer any guidance here? I've been unsuccessfully trying to make this happen for over a week.

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• How do I clean dust from a computer?

  - by Jonas

  As computers become faster and generate more heat it gets more important to have good ventilation, but that also increases the amount of dust sticking to the components of the computer. It's of course better to make sure the computer never gets dusty by vacuum cleaning around it (not in it) frequently. But what to do if it's already to late? I've heard that vacuum cleaning the computer itself is very bad, since it can cause static electricity that hurts the computer. So, Does anyone have any tips for how to remove dust from your computer?

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• Is it a good idea to have the operating system on a solid state drive?

  - by Kenji Kina

  There is something I don't quite understand. I know a SSD helps with OS load times, but I'm not sure if all this boost is only noticeable/interesting when booting, or gives an all around considerably better experience thereafter. I am interested in having a quick and responsive environment after booting, which leads me to think that it'd be better to spend the SSD capacity in my most used apps (and the page file? Another inside question) and not the OS itself. This, of course, means that I don't know just how much the OS reads/writes its files during normal usage. So, how good an idea is it to dump the whole 20GB+ of Windows 7 OS into the SSD (considering the hefty price per GB of SSD capacity) if I can put up with the usual hard disk boot times? Would I be missing on a lot if I didn't?

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• Harddrive in the freezer ever work for you?

  - by Stefan Thyberg

  Once upon a time, my little 10 GB drive in my webserver failed and of course I had no backup, teaching me to immediately set up an automatic backup job afterwards. Anyhow, this drive refused to start and as a last-ditch effort I put it in a plastic bag and put it in the freezer overnight, since I had heard somewhere that it might work and I really didn't have any other options. The next day I take it out, immediately plug it in outside the case and lo and behold, the drive works long enough for me to copy my data off it. Have you ever had a similar experience with this method?

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• Where is a reputable place to buy ink refills for my color laser printer?

  - by FooBook

  I was looking around for a place to buy a refill kit for my laser printer. Of course, there are thousands of websites that are selling these kits. The problem is that I can't tell which one is a good one to buy from. How can I tell if the store has a good reputation. I don't want to pay, and then not receive the item. This has happened to me before (IvySkin). Or get conned some other way. One place I found is printerinkcartridge.us. But again, I can't find any independent information from people that they have successfully ordered products from there, and that they received what they expected. Are there any reliable sites you can suggest where I may order a kit from? Is the one I found good enough? Thanks guys.

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• Reliable Backup Solution for Linux for Complete System Restoration

  - by Chris S

  What's the best backup solution for Linux that can completely restore the entire filesystem to a blank harddrive (including partitioning) after an old harddrive dies? I'm currently running a few Ubuntu machines, some with RAID-1 and others without RAID (mostly laptops). I'd like to implement a backup solution that can take incremental snapshots of the entire filesystem, so that if I were to replace all the harddrives in a machine, I could use the backup to restore a perfect copy of the previous filesystem. Unfortunately, nearly all the backup solutions I've found seem to be glorified rsync scripts, which only backup some files, and have no easy way to restore once the entire filesystem is gone. Some of the more complicated solutions, like Bacula, might do what I need, but require a complicated server/client setup and are notoriously difficult to maintain. I've heard that Apple's TimeMachine utility has this ability, and I've had similar success taking differential disk images with Acronis True Image on Windows, but of course neither of these work on Linux. Is there anything comparable for Ubuntu?

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• Daemons die with bus error when their binaries live on NFS

  - by mbac32768

  We have some daemons executing on a number of hosts. The daemon executable images are these very large binaries that are hosted on NFS. When the binaries are updated on the NFS server, the previously running daemons sometimes drop dead with a Bus error. I'm assuming what's happening is the NFS server is replacing the binaries in a way that's invisible to the VFS layer on the NFS clients so they end up loading pages from the updated binary, which of course leads to madness. We tried moving the new binaries into place instead of cp, but that doesn't seem to fix it. I'm considering simply mlock()'ing the binary in the daemon startup script, but surely there's magic NFS options or semantics that we should be abusing. Is there a better way to fix this?

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• Deploy Windows 7 Backup set to Windows 8

  - by Matthias

  Situation: We have a laptop here that's completely fubar. I.e: The hard drive is filled to the brim with bad sectors. Luckily, backups have been made using the built-in Windows 7 backup feature. This produces folders named Backup Set 2012-11-09 003009, containing folders like Backup Files 2012-11-09 003009, containing zip-files like Backup files 1, 2, 3,... Our brand new laptop comes with Windows 8. Now: Can we, using the standard back-up and restore feature in Windows 8, restore all the documents, music, etc. using the Windows 7 backup files? Thanks. (FYI: We also took a normal backup of all the documents just to be sure of course. I'm just curious what would happen. I would test it out, but the new laptop hasn't arrived yet and I wanted to make sure my efforts would not be in vain.)

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• Modern open source NIDS/HIDS and consoles?

  - by MattC

  Years back we set up an IDS solution by placing a tap in front of our exterior firewall, piping all the traffic on our DS1 through an IDS box and then sending the results off to a logging server running ACiD. This was around 2005-ish. I've been asked to revamp the solution and expand on it and looking around, I see that the last release of ACiD was from 2003 and I can't seem to find anything else that seems even remotely up-to-date. While these things may be feature complete, I worry about library conflicts, etc. Can anyone give me suggestions for a Linux/OpenBSD based solution using somewhat modern tools? Just to be clear, I know that Snort is still actively developed. I guess I'm more in the market for a modern open-source web console to consolidate the data. Of course if people have great experiences with IDS' other than Snort I'm happy to hear about it.

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• Linux - How to manage the password of root?

  - by Jonathan Rioux

  We have just deployed a couple of Linux server. Each sysadmin will have his own account on the server (i.e.: jsmith), and will connect using SSH with a certificate which will be put into the "authorized_keys" file in their home directory. Once connected on the server, if they want to issue an elevated command, they will do like: sudo ifconfig They will then enter the root password. What I would like to know now are the best practices in managing that root password. Should I change it periodicaly? And how do I share that new password with the sysadmins? **Of course I will disable the root logon in SSH.

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• How can I find a laptop if it has a different model name all over the world?

  - by Mike

  CONUNDRUM: A laptop review in the UK talks about how brilliant the "ASUS ABCDE 55" is, but in America, France, etc there is no such laptop name. In fact it's called "ASUS 12345 AB" - AAARRGH! QUESTION: Is there a way of finding out all the diverse names for the same laptop all over the world? Example: if Samsung create a R2D2500, then what is that spec laptop called in all the other countries (if they release it of course). Or if it's not released, what is their similar spec laptop called in the other countries? I understand that specs may be different, but if I read a review on my trusted UK website, but live in say Australia, I want to be able to find the name of the same laptop in Australia and then check out local places to buy it. So if anyone knows if there is a technique, specific website, or even how to use a company website to find out these annoying name changes I'd really appreciate it.

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• What happens with the Guest OS's on ESXi in the event of a power failure?

  - by Jeremy Holovacs

  Many small businesses would prefer to let their server drop on power failure than to pay even $100 for a cheap UPS. It's often difficult to convince them of the value of something like that; it's why they like ESXi. It's free, they can save a lot of cash by putting a bunch of linux servers on one machine, and then I get paid. :) If the ESXi server experiences a power outage, it is set to come back on automatically when power is restored. What happens with the guest OS's? Ideally I would like them to all come online again as well, assuming they were on when power was lost, but I see no option for choosing this. I don't want to yank power to the system just to try it out, of course. I'm sure someone knows what happens by default, and perhaps how to make my system to work as I would wish.

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• Printer Brother DCP-110C Linux 64-bit drivers

  - by Ondra Žižka

  Hi, I need 64-bit Linux driver for DCP-110C (for Ubuntu 10.04 64-bit) I found only 32-bit here. http://welcome.solutions.brother.com/bsc/public_s/id/linux/en/index.html I've tried to follow those instructions. During the installation, I got this: ondra@ondra-doma:~/Downloads$ sudo dpkg -i --force-all dcp110clpr-1.0.2-1.i386.deb dpkg: warning: overriding problem because --force enabled: package architecture (i386) does not match system (amd64) (Reading database ... 257283 files and directories currently installed.) Preparing to replace dcp110clpr 1.0.2-1 (using dcp110clpr-1.0.2-1.i386.deb) ... Unpacking replacement dcp110clpr ... Setting up dcp110clpr (1.0.2-1) ... ln: creating symbolic link `/usr/lib/libbrcompij2.so.1.0': File exists ln: creating symbolic link `/usr/lib/libbrcompij2.so.1': File exists ln: creating symbolic link `/usr/lib/libbrcompij2.so': File exists After installation, the printer is listed at the cups server, but does not work (no command has any effect on printer (which is, of course, on and connected)). Anyone has found some working solution? Thanks, Ondra

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• Route an IP from WAN to a host on LAN on OpenWRT

  - by Zsub

  EDIT: I know how to use NAT, I specifically want the server to be reachable on two IP's, one private, one public, with the firewall of the OpenWRT in between, if feasible. At the office we have recieved a /29 from our ISP. The first address is reserved for their endpoint, so I'm free to use five addresses. We run a local network, so of course there is a router in between running OpenWRT to provide all hosts with (W)LAN (dhcp from a private range). However, we also have a server running OS X Server 10.6 (Snow Leopard) and I'd like that server to be accessible both from the LAN using a private IP as well as from the WAN on it's own public IP. Point of note is that the server only has one network port, so multiple NICs is not an option, unfortunately. How would I go about doing this?

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• Office 2007 network share access denied

  - by Rodent43

  Hope I have not duplicated an issue already posted but I could not find anything from the search... Right here is the problem, we have recently updated all our desktops to the MS Office 2007 suite and people have issues trying to open simple files like word documents... the systems are Windows XP (SP3) Novell Network with novell client Office 2007 when they try to open a word document from a usual network share word presents a message reporting Access Denied Contact Administrator So we assumed network permissions, none of which have changed...so try the same file with Wordpad and it opens fine, be it with formating issues of course... Now copy the file to your desktop, which is not redirected, and you can open the file in word as normal... so does anyone know if office 2007 uses some new permission when opening files? does it create temps or something... any pointers would be appreciated

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• balancing loudest and quietest speaker noises

  - by Dan

  It is hard for me to find the right volume for my computer to watch my dvd's on because it seems like most reasonable volumes become overwhelming at the loudest parts of a movie and it is hard to even make out the dialog at the quietest parts. I find I'm constantly adjusting the volume during the course of a movie. Are there ways to make the difference between the louds and the quiets not so extreme? (both computer related solutions and non-computer related solutions welcome). Like moving my speakers across the room and increasing the volume? or the opposite? Or would would the extremes be less noticeable if I used headphones? Are there movie players that might have more complex sound adjustment features? If there is a software solution out there for linux that would be great too. Thanks, Dan

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• Unlock file on Windows Server 2003 by remote desktop without rebooting

  - by BalusC

  We've several Windows Server 2003 machines running, each with its own purposes. There are scheduled jobs which synchronizes some files over SFTP using WinSCP. Very sometimes a newly copied file is left locked in the "inbox" folder without any reason. The machine's own background task (programmed in Java) can't move it to the "processed" folder anymore after processing it. Manually moving it only yields the well known error message Cannot move [filename]: it is being used by another person or program. The only resort is to reboot the machine, but we would of course like to avoid that. Any suggestions? I tried Unlocker which works fine locally at WinXP, but doesn't work at those Win2K3 machines by remote desktop (unlock option doesn't show up in rightclick context menu). I tried Process Explorer as well as described in this blog article, but it caused the server to crash (not sure if that's because it's executed through remote desktop).

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