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• How can I use scp without providing a password

  - by Tim

  I have asked a question before in here. My question was that I tried to give my password to scp via piping echo mypassword | scp [email protected]:project/* ~/project/ However it still asks me to manually input the password. How should I specify mypassword to scp in commands? I still don't understand one of the replies. what is a input stream by TTY, for example? What are the common ways for a input stream? How to know what type of input stream a stdin input to a command is? For example that of ssh/scp.

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• Setup kickstart boot for all installation media types (cd and usb-flash)

  - by Cucumber

  I created own custom CentOS iso. I used mkisofs make it. This is part of my isolinux.cfg file: label vesa menu label Install ^RAIDIX system kernel vmlinuz append initrd=initrd.img xdriver=vesa nomodeset text linux ks=cdrom:/isolinux/ks.cfg If I specify parameter ks=cdrom:/isolinux/ks.cfg my iso will boot only from cd or dvd-rom. If I specify parameter ks=hd:<device>:/ks.cfg my iso will boot only from usb-drive. Can I specify ks parameter to boot from both type of installation media?

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• How to setup separate MySQL and PHP VPS servers

  - by Fazal

  Someone recommended I should have my MySQL server separate from my Apache/PHP server in case of hacking and such. By visiting linode, slicehost and various articles here on serverfault I've managed to cobble together a decent set of instructions on how to do the Apache/PHP bit. I'm using Rackspace VPS and they provide an internal IP for each server. If I setup a MySQL VPS, should I assume that I would just add the internal IP for the database host? And I guess that I would only need to open up my default ssh port and mysql ports and install phpmyadmin on there? Ideally I would have webserver.mydomain.com and dbserver.mydomain.com (two 256mb VPS's) with servermin on webserver.mydomain.com and phpmyadmin on dbserver.mydomain.com. If anyone has any guides or advice on how to setup this type of solution I'd be more then grateful!

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• Nginx & Passenger - failed (11: Resource temporarily unavailable) while connecting to upstream

  - by Toby Hede

  I have an Nginx and Passenger setup that is proving problematic. At relatively low loads the server seems to get backed up and start churning results like this into the error.log: connect() to unix:/passenger_helper_server failed (11: Resource temporarily unavailable) while connecting to upstream My passenger setup is: passenger_min_instances 2; passenger_pool_idle_time 1200; passenger_max_pool_size 20; I have done some digging, and it looks like the CPU gets pegged. Memory usage seems fine passenger_memory_stats shows at most about 700MB being used, but CPU approaches 100%. is this enough to cause this type of error? Should i bring the pool size down? Are there other configuration settings I should be looking at? Any help appreciated Other pertinent information: Amazon EC2 Small Instance Ubuntu 10.10 Nginx (latest stable) Passenger (latest stable) Rails 3.0.4

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• how to pass traffic for port 80 not through openvpn?

  - by moti

  Is there a way to configure OpenVPN clients to route traffic for HTTP port 80 and HTTPS port 443 directly (i.e. not through the VPN), but through the regular default gateway the clients have. All other traffic should go through the VPN. My client is running OpenVPN on Windows and my current configuration looks like this: client dev tun proto tcp remote my-server-2 1194 resolv-retry infinite nobind persist-key persist-tun ca ../keys/ca.crt cert ../keys/client1.crt key ../keys/client1.key ns-cert-type server verb 3 route-metric 1 show-net-up dhcp-renew dhcp-release route-delay 0 120 hand-window 180 management localhost 13010 management-hold management-query-passwords management-forget-disconnect management-signal auth-user-pass

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• What steps can you take to ensure sane build environments when compiling software?

  - by Chris Adams

  Hi guys, I've been stuck with a compilation problem when building a standardised virtual machine on CentOS 5.4, and I'm in the dark here as to a) why this error is occurring, and b) how to fix it, and in the hope that someone else stumbles across this problem too, I'm hoping someone can help me find the solution here. I'm getting a configure: error: newly created file is older than distributed files! error when trying to compile Ruby Enterprise like below when I try to run the installer, and the solutions offered to on the forums (of checking the tine, and touching the files to update the time associated with them) don't seem to be helping here. What steps can I take to work out what the cause of this problem? [vagrant@vagrant-centos-5 ruby-enterprise-1.8.7-2009.10]$ sudo ./installer Welcome to the Ruby Enterprise Edition installer This installer will help you install Ruby Enterprise Edition 1.8.7-2009.10. Don't worry, none of your system files will be touched if you don't want them to, so there is no risk that things will screw up. You can expect this from the installation process: 1. Ruby Enterprise Edition will be compiled and optimized for speed for this system. 2. Ruby on Rails will be installed for Ruby Enterprise Edition. 3. You will learn how to tell Phusion Passenger to use Ruby Enterprise Edition instead of regular Ruby. Press Enter to continue, or Ctrl-C to abort. Checking for required software... * C compiler... found at /usr/bin/gcc * C++ compiler... found at /usr/bin/g++ * The 'make' tool... found at /usr/bin/make * Zlib development headers... found * OpenSSL development headers... found * GNU Readline development headers... found -------------------------------------------- Target directory Where would you like to install Ruby Enterprise Edition to? (All Ruby Enterprise Edition files will be put inside that directory.) [/opt/ruby-enterprise] : -------------------------------------------- Compiling and optimizing the memory allocator for Ruby Enterprise Edition In the mean time, feel free to grab a cup of coffee. ./configure --prefix=/opt/ruby-enterprise --disable-dependency-tracking checking build system type... i686-pc-linux-gnu checking host system type... i686-pc-linux-gnu checking for a BSD-compatible install... /usr/bin/install -c checking whether build environment is sane... configure: error: newly created file is older than distributed files! Check your system clock This is a virtual machine running on virtualbox, and the time of the host and the virtual machine are identical, and up to date. I've also tried running this after updating time with an ntp-client, so no avail. I tried this after reading this post here of someone having a similar problem [vagrant@vagrant-centos-5 ruby-enterprise-1.8.7-2009.10]$ date Tue Apr 27 08:09:05 BST 2010 The other approach I've tried is to touch the top level the files in the build folder like suggested here, but this hasn't worked either (an to be honest, I'm not sure why it would have worked either) [vagrant@vagrant-centos-5 ruby-enterprise-1.8.7-2009.10]$ sudo touch ruby-enterprise-1.8.7-2009.10/* I'm not sure what I can do next here - the problem seems to be the bash configure script that returns this error error: newly created file is older than distributed files!, at line :2214 { echo "$as_me:$LINENO: checking whether build environment is sane" >&5 echo $ECHO_N "checking whether build environment is sane... $ECHO_C" >&6; } # Just in case sleep 1 echo timestamp > conftest.file # Do `set' in a subshell so we don't clobber the current shell's # arguments. Must try -L first in case configure is actually a # symlink; some systems play weird games with the mod time of symlinks # (eg FreeBSD returns the mod time of the symlink's containing # directory). if ( set X `ls -Lt $srcdir/configure conftest.file 2> /dev/null` if test "$*" = "X"; then # -L didn't work. set X `ls -t $srcdir/configure conftest.file` fi rm -f conftest.file if test "$*" != "X $srcdir/configure conftest.file" \ && test "$*" != "X conftest.file $srcdir/configure"; then # If neither matched, then we have a broken ls. This can happen # if, for instance, CONFIG_SHELL is bash and it inherits a # broken ls alias from the environment. This has actually # happened. Such a system could not be considered "sane". { { echo "$as_me:$LINENO: error: ls -t appears to fail. Make sure there is not a broken alias in your environment" >&5 echo "$as_me: error: ls -t appears to fail. Make sure there is not a broken alias in your environment" >&2;} { (exit 1); exit 1; }; } fi ### PROBLEM LINE #### # this line is the problem line - this is returned true, sometimes it isn't and I can't # see a pattern that that determines when this will test will pass or not. test "$2" = conftest.file ) then # Ok. : else { { echo "$as_me:$LINENO: error: newly created file is older than distributed files! Check your system clock" >&5 echo "$as_me: error: newly created file is older than distributed files! Check your system clock" >&2;} { (exit 1); exit 1; }; } fi the thing that makes this really frustrating is that this script works sometimes, when the VM has been running for an hour or so it works, but not at boot. There's nothing I see in the crontab that suggests any hourly tasks are run that might change the state of the system enough make a difference to this script working. I'm totally at a loss when it comes to debugging beyond here. What's the best approach to take here? Thanks

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• Good HDMI splitter/switch solution

  - by Mehper C. Palavuzlar

  I have a full HD TV which has only 2 HDMI ports on it. Since I have more than 2 devices I connect to TV (e.g. laptop, game console, DVD player), it becomes uncomfortable to plug in and plug out HDMI cables every time I need to use the relevant device. I need a cheap solution to increase the number of my HDMI ports at least to 3. What type of splitter/switch do you recommend? Does the quality of splitter matter, or do they all produce the same audio & video quality?

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• Reliable cheap or free DNS service?

  - by superwormy

  I'm looking for a reliable free or cheap DNS service. I've used FreeDNS at FreeDNS.Afraid.org in the past, but it doesn't always seem reliable... sometimes people say they can't access my website (sometimes I can't access it either) by domain name, and yet if I type in the IP address it works fine, so I assume it's some sort of DNS problem. Are there any other cheap or free DNS services out there? I need something reliable that I can manage via a web interface (or scripts if they have an API) that I can use to manage the DNS for ~100 domain names. EDIT: To be clear, I'm looking for DNS hosting, not DNS servers to use for my WAN connection.

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• linux refused to mount a valid partition

  - by greg

  My setup is a linux box with 1 partition used thought LVM - has been working for years. I add a freeze and after the reboot the partition cannot be mounted: mount -r -t ext3 /dev/pve/data /mnt/pve-data mount: wrong fs type, bad option, bad superblock on /dev/mapper/pve-data, missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so However fsck doesn't see any problem with it: fsck.ext3 -fp /dev/pve/data /dev/pve/data: 3024076/60366848 files (0.6% non-contiguous), 156921642/241435648 blocks There's nothing in dmegs nor the syslog. I'm puzzled, what's wrong with my partition? Thanks in advance greg debian 5.0.10 LVM 2.02.39

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• Issues with partitions WIN 7

  - by pomber

  I was trying to make some space to install linux in my HP notebook. The computer had 4 partitions, I made space shrinking one and created a new one (facepalm) using the windows partitioning tool. It show me some warning message saying something about dynamic partitions, I ingored it, and went to the linux live CD. I installed linux in the new partition, after the installation completed it told me that GRUB cannot be installed I dont remember why. So now, it doesnt boot, neither windows nor linux. After google for a while I found the diskpart command, it gives me this info: DISKPART> list disk DISK ### Status -------- --------------- DISK 0 Invalid DISKPART> select disk 0 DISKPART> select partition Partition ### TYPE ------------- -------------- Partition 1 Dynamic Data Partition 2 Dynamic Data Partition 3 Dynamic Data Partition 4 Primary <- I think I put linux here Any idea whats happening? Or how to solve it? Thanks

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• Looking for zsh completion file for osX native commands

  - by Chiggsy

  I've been digging deep into what actually comes with osX in /usr/bin and especially /usr/libexec. Quite good stuff really, although the command syntax is a bit.. odd. Let me direct the curious to the command that made me think of this: networksetup -printcommands I can not think of a command that better illustrates the need for good completion. security -h perhaps, but those commands have a familiar easy-to-read format. I beseech the community, please point me to a place where I can find such a thing. I never type them right, and I ache for tab completion for this Anyone have any idea where I could grab something? I'd prefer to stand on the shoulders of giants instead of trying to make a zsh/bash completion script leap into the world, ready for battle, like Athena, from my forehead. I am no Zeus when it comes to compctl. Not at all.

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• Windows Vista wont recognize SSD drive

  - by Spiros

  I just bought an SSD drive for my Vista (32bit) box (120GB OCZ Agility 3). Unfortunately windows vista won't display it in the my computer window, and generally wont let me work on it. However, the bios recognizes the SSD drive correctly, and when I go on the windows device manager the drive is there as well. I can see the device properties. On the volumes, when I click on populate, I have: Disk: Disk1 Type: Uknown Status: not initialized Partition style: not avaiable Unallocated space: 0MB Reserved space: 0MB Any ideas what could be wrong? Thanks

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• Windows 2003 Cluster: Failover Delay

  - by Ramon Marco Navarro

  I am testing the failover policies of our test failover cluster system. When I shutdown the node who is currently controlling the cluster (NODE1), it takes about 2 mins and 40 seconds before the next node on the preferred list (NODE2) takes control of the cluster. I tried changing the looksAlive and isAlive interval to 5000ms to all resources, but that didn't help. Looking at the Event Viewer of the remaining nodes, it shows that it was almost instantly detected that NODE1 was down. But it took another ~2:40 minutes for it to be removed from the live cluster list and for NODE2 to take over. Is there anyway of changing or shortening this "failover delay"? This is the setup of the cluster: (1) One ClusterDC connected to the public network (3) Three nodes running Win2003 with a quorum type of MNS Private network is connected to network hub ________________ _________________ (ClusterDC)=------=| |=------=(Node1)=------=| | |Public Network|=------=(Node2)=------=|Private Network| | (Switch) |=------=(Node3)=------=| (Hub) | ---------------- -----------------

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• Dig returns "status: REFUSED" for external queries?

  - by Mikey

  I can't seem to work out why my DNS isn't working properly, if I run dig from the nameserver it functions correctly: # dig ungl.org ; <<>> DiG 9.5.1-P2.1 <<>> ungl.org ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 24585 ;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 1 ;; QUESTION SECTION: ;ungl.org. IN A ;; ANSWER SECTION: ungl.org. 38400 IN A 188.165.34.72 ;; AUTHORITY SECTION: ungl.org. 38400 IN NS ns.kimsufi.com. ungl.org. 38400 IN NS r29901.ovh.net. ;; ADDITIONAL SECTION: ns.kimsufi.com. 85529 IN A 213.186.33.199 ;; Query time: 1 msec ;; SERVER: 127.0.0.1#53(127.0.0.1) ;; WHEN: Sat Mar 13 01:04:06 2010 ;; MSG SIZE rcvd: 114 but when I run it from another server in the same datacenter I receive: # dig @87.98.167.208 ungl.org ; <<>> DiG 9.5.1-P2.1 <<>> @87.98.167.208 ungl.org ; (1 server found) ;; global options: printcmd ;; Got answer: ;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 18787 ;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0 ;; WARNING: recursion requested but not available ;; QUESTION SECTION: ;ungl.org. IN A ;; Query time: 1 msec ;; SERVER: 87.98.167.208#53(87.98.167.208) ;; WHEN: Sat Mar 13 01:01:35 2010 ;; MSG SIZE rcvd: 26 my zone file for this domain is $ttl 38400 ungl.org. IN SOA r29901.ovh.net. mikey.aol.com. ( 201003121 10800 3600 604800 38400 ) ungl.org. IN NS r29901.ovh.net. ungl.org. IN NS ns.kimsufi.com. ungl.org. IN A 188.165.34.72 localhost. IN A 127.0.0.1 www IN A 188.165.34.72 and the named.conf.options is default: options { directory "/var/cache/bind"; // If there is a firewall between you and nameservers you want // to talk to, you may need to fix the firewall to allow multiple // ports to talk. See http://www.kb.cert.org/vuls/id/800113 // If your ISP provided one or more IP addresses for stable // nameservers, you probably want to use them as forwarders. // Uncomment the following block, and insert the addresses replacing // the all-0's placeholder. // forwarders { // 0.0.0.0; // }; auth-nxdomain no; # conform to RFC1035 listen-on-v6 { ::1; }; listen-on { 127.0.0.1; }; allow-recursion { 127.0.0.1; }; }; named.conf.local: // // Do any local configuration here // // Consider adding the 1918 zones here, if they are not used in your // organization // include "/etc/bind/zones.rfc1918"; zone "eugl.eu" { type master; file "/etc/bind/eugl.eu"; notify no; }; zone "ungl.org" { type master; file "/etc/bind/ungl.org"; notify no; }; The server is running Ubuntu 9.10 and Bind 9, if anyone can shed some light on this for me it'd make me very happy! thanks

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• Cisco 2811 router ignored input errors

  - by elbekay

  I've got a Cisco 2811 (AdvIPServices 12.4(25e)) that is showing input errors on both its interfaces, all the errors are of the ignored type. The counter for ignore errors is not increasing continuously, which made me think it would be happening in line with traffic bursts, but there really isn't a large amount of traffic running through it at any time. Both the router interfaces are connected to a 4900 (IPBase 12.2(54)) series switch. The only things I can see are: There is a slight mismatch in duplex/speed negotiation settings, one side is set to auto/auto and one full/auto, however they have negotiated fine. There have been a few fallbacks on the interface buffers, and some trims in the public buffers. Any suggestions for things to look at? I will be correcting the duplex neg settings, and might try a buffer tune, but I don't think it will help.

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• How can I tell if my Amazon Windows instance was an SQL Server AMI?

  - by Aligma

  I want to purchase some reserved instances, because I have several instances already created and running 24 hours a day. When I go to purchase a Windows instance, I can see 3 options, Windows Windows with SQL Server Standard Windows with SQL server Web I don't know which of these was used to create the original instance. Is there a way I can find out? My assumptions: the instance type is is important because as far as I understand, the way to purchase a reserved instance is to first have a running instance, and then purchase a matching reserved instance. The reserved instance is not itself a new machine, but a kind of contract between you and Amazon to pay for an instance for 1 or 3 years, at a discounted rate. The contracted, reserved instance will "offset" one matching running instance where they have the same size and platform. Please feel free to correct me if these assumptions are incorrect.

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• Problem with shared ssh keys

  - by warren

  Following the process I've used in other environments, I've tried setting-up shared keys between my Mac and my CentOS 4 webserver. I've seen the same problem with my older Ubuntu 7.10 workstation trying to connect via keys to the same webserver. I have tried both dsa and rsa keytypes (sshkeygen -t <type>). The sshd_config file on my webserver seems to be allowing key-based logins: RSAAuthentication yes PubkeyAuthentication yes AuthorizedKeysFile .ssh/authorized_keys And my .ssh/authorized_keys has my dsa and rsa keys added. Where should I be looking for what to change next to make key-based logins "Just Work™"? Is it related to the line, #UseDNS yes and sshd is trying to do a reverse-lookup on my IP, but cannot because it's NAT'd?

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• What changes can be made to a Microsoft Account using net user on Windows 8?

  - by nhinkle

  In Windows 8, you can log on with a local account or with a Microsoft Account. Both types show up in the Users control panel, but there are different options that you can change for each type. An administrator can change basically any aspect of a local user - name, password, access level, etc. For a Microsoft Account, you can only change the access level (admin/standard) or remove the account. From the command line though, there don't appear to be any restrictions on what you can do a Microsoft Account. Using the net user tool or the Local Users and Groups MMC snap-in, it looks like an administrator would be able to change the password, display name, profile path, etc. of Microsoft Accounts (as well as local accounts of course). Will these commands actually work when applied to a Microsoft Account? Will using them in some way break the link to the Microsoft Account, or will nothing happen at all? I'm hesitant to test since I don't want to mess up my account permanently.

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• MailMan error logging in Apache

  - by ericl42

  I am working on a MailMan implementation using Fedora 12. I have it set up and running but I was looking at what happens if someone tries to brute force a password on the web GUI and found that MailMan doesn't log these errors at all or I'm completely looking in the wrong place. I have tried both /var/log/httpd and /var/log/mailman and didn't see any authentication errors. I have also tried bumping up the Apache log level and still didn't see anything. I was wondering if there was a way to turn this type of logging on or if there was any other way to be notified about it. Thanks.

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• Belkin Flip KVM keyboard skip problems

  - by Craig

  I have just bought a Belkin Flip 2 port KVM. Functionally it is almost there except I have a keyboard sticking problem. So if I type the word 'Hello' it will often (about 25% of the time) output 'Hellooooooooooooooooooooo'. If I plug the keyboard directly into the USB on the computer I don't have this problem, only when plugged into the KVM. I feel like it is a USB speed problem. Followup It appears I have the same problem with the mouse, it will jump from one side of the screen to the other as I move it. The mouse is annoying but half as much as the keyboard.

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• Writing your own Makefile for OpenBSD ports

  - by The_dude_man

  I have an OpenBSD box running Python 2.6. I want to install py-setuptools, but that package is built against 2.5. I was curious as to what the Makefile for py-setuptools [Someone with rep, fix me please][http://www.openbsd.org/cgi-bin/cvsweb/ports/devel/py-setuptools/Makefile?rev=1.13;content-type=text%2Fx-cvsweb-markup ] looks like, to see if it mentioned anything about Python 2.5 as a dependency. I did not find anything version-dependent. I typed make install in /usr/ports/devel/py-setuptools on a whim, and it blew up because of failed missing Python 2.5 dependency. That is expected. My question is, How do I modify the Makefile to build against Python 2.6 ? I came across this in the man pages [please fix me][http://www.openbsd.org/cgi-bin/man.cgi?query=port-modules&sektion=5&arch=&apropos=0&manpath=OpenBSD+4.6#CORE+MODULES] , but I am still clueless how to specify what version to build against. Also, I dont see anything that actually installs the egg.

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• How to check for the existence of a response header in Nginx rules?

  - by Victor Welling

  Setting up the rewriting rules for the request proved to be quite easy in Nginx. For the response, not so much (at least, not for me). I want to strip the Content-Type header from the response if the Content-Length header of the response isn't set. I have the NginxHttpHeadersMoreModule installed, so that should allow me to remove the header, but I can't seem to find a way to check for the existence of the Content-Length header of the response using a rule in Nginx's configuration. Any suggestions on how to do this would be most appreciated!

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• How to create an alias for linux server name?

  - by Radek

  The openSUSE server name is 'darkhelmet'. I want to create an alias 'dh' for it. So I can also type 'ssh dh' and 'http://dh' would work too. What file/files and where do I have to edit to make this happen? Extract from /etc/hosts from darkhelmet 127.0.0.1 localhost # special IPv6 addresses ::1 localhost ipv6-localhost ipv6-loopback fe00::0 ipv6-localnet ff00::0 ipv6-mcastprefix ff02::1 ipv6-allnodes ff02::2 ipv6-allrouters ff02::3 ipv6-allhosts 127.0.0.2 darkhelmet.edumate darkhelmet 10.0.0.22 db2workgroup db2workgroup [root][skroob] nslookup darkhelmet Server: 10.0.0.10 Address: 10.0.0.10#53 Name: darkhelmet.edumate Address: 10.0.0.22

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• Accessing DHCP Client's vendor-encapsulated-options

  - by Jason Owen

  In the dhcpd.conf file for isc-dhcpd-V3.1.1, I have set up a vendor options space and defined several different options. I am able to use those definitions to send options from the server to the client in the vendor-encapsulated-options option (code 43). However, the client is also sending vendor options back to the server, in the same way, and I'd like to respond differently depending on the type and contents of the options. As far as I can tell, the the server isn't parsing the client's vendor-encapsulated-options at all - the option operator is just returning null. Is there a way to get the server to populate the options in the vendor space I've defined?

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• How to change image to this color?

  - by askmoo

  I have this image And I need to change it to the color #D21108 (type of RED). Of course, I do not want to paint it to this color, but to change the color to #D21108 and its shades (like I do in Photoshop via Brush Colour Replacement). I have all info about this color, values of RGB, CMYK, Lab and HSV if you need them. Now, I guess I can easily change it via GIMP's menu "Colors". I tried options Color Balance, Hue-Saturation, Colorize, but I did not find a way to enter the starting color I need. I was closest to my aim via Hue-Saturation, but I could not get this red value, no matter what I tried. As I am not a graphics expert, please tell me how to accomplish this task. PS. What's the meaning of Lab and HSV in the color scheme? I know the meaning of RGB and CMYK.

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