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• Is it possible for a directory to get unlinked while its contained files remain?

  - by Walkerneo

  I used to wonder why deleting directories via PHP or shell wasn't as easy as it was in Windows with just clicking delete. I realize now that deleting is simply unlinking files from the file allocation table, so to delete a directory, you must unlink all the files inside it. Is it ever possible for the directory's entry to be removed, but not those of the files inside it? Do operating systems periodically check for files that can't be reached in the file system?

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• Connect to powershell through SSH with keyexchange?

  - by Lucas Kauffman

  I have little experience with Windows systems. Coming from a Linux background I was wondering if there is a way that I can ssh to powershell from a Linux shell? If this is not possible, is there a key exchange like way to connect from powershell to powershell? I prefer it if I do not need to enter a password for every single server every time. If this all sounds a bit crazy and there are better ways that windows does this, then feel free to share.

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• strange behaviour of grep in UNIX

  - by Happy Mittal

  When I type a command $ grep \\h junk then shell should interpret \\h as \h as two pairs of \ become \ each, and grep in turn, should interpret \h as \h as \ becomes \, so grep should search for a pattern \h in junk, which it is doing successfully. But it's not working for \\$. Please explain why ?

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• strange behaviour of grep in UNIX

  - by Happy Mittal

  When I type a command $ grep \h junk then shell should interpret \h as \h as two pairs of \ become \ each, and grep in turn, should interpret \h as \h as \ becomes \, so grep should search for a pattern \h in junk, which it is doing successfully. But it's not working for \$. Please explain why ?

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• What is the easiest way to scale a Quicktime MOV to a different size in Windows?

  - by Neil

  I've tried a ffmpeg, and it doesn't know how to read Quicktime MOV, neither does VirtualDub. Avidemux crashes when I open the Quicktime MOV. In Linux, I'd just use MEncoder, but I'm telling someone over the phone how to resize this 1080p MOV file, so having them use MEncoder in a command shell would be annoying. Any ideas?

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• SFTP to download whole directory?

  - by johnlai2004

  I'm on ubuntu. I only have sftp access to a remote server. The remote server disabled shell, so i can't use ssh or scp command. Is there a way for me to recursively get the entire /var/www directory onto my localhost?

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• Run Java Project from Ubuntu Terminal?

  - by Christopher Gwilliams

  I have a small java project that handle connections. In order to run it from the terminal I have to cd into the folder that contains the source and run the following command: java -cp classes com.packagename.mainclass Where classes is the folder that contains the classes. I want ubuntu to run this application on startup, is there a Java command I can use? Or am I just better off creating a shell script? Thanks!

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• PAM / LDAP authentication with Ubuntu 10.04

  - by t6d

  I can't wrap my brain around the new pam.d configuration syntax used in Ubuntu 10.04. How do I setup PAM so that it allows users stored in my LDAP database to login. I already configured nscd, so id <user> or getent passwd are already listing my LDAP users, but PAM doesn't work, whether the normal shell login nor su.

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• Removing files on a limit access backup server

  - by Bart van Heukelom

  I have an account on a backup server but it's full, so I need to clear it. The problem is that It's only accessible via FTP, SFTP and Rsync (no shell) Deleting lots of small files (as in, multiple full Linux installations), which I have to do, is undoable over FTP/SFTP because it cannot recursively delete directories in one command (Yes, most clients will fake this by issueing all the seperate commands for you but the overhead is huge and the process takes several days...well it crashes before that). What do I do?

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• Cygwin :: mount

  - by gabriela reyna

  I'm trying to configure the cygwin to work with TWiki, I have to input this in the Cygwin bash shell: mount -b -s c:/... but it doesn't recognize the "-s", I already fixed the problem with -b, it changed the syntax and now is "mount -o binary" for the "mount -b"part. But now it says unknown option with the "-s" anyone?? help?? or what does the -s mean, so I can look it up :S

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• linux text editor for windows

  - by lego 69

  hello, can somebody recommend me good Linux text editor for Windows (if it exists), I wrote scripts for C-Shell using txt editor of windows but I have problem, it doesn't run cause windows is not UNIX, what can I do? I don't want to install linux for a few scripts, I do testing of my scripts via unix server (this server is not mine), thanks in advance

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• Preventing some apps from appearing on the start menu on vista

  - by Ben

  Vista start menu shows your most frequently used apps, which is great, I love it. However, there are some apps which I use frequently through shell or such, that I do not want to appear on that menu. Winrar, Media Player Classic, Infranview... I can right click on it to remove it, but it'll return to the menu shortly, how can I set it so that those apps never appear on the start menu. Thanks.

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• How do I create a bridged virtual network for libvirt+KVM+ubuntu-server the easy way?

  - by Arthur Ulfeldt

  I see lots of documentation on how to manually set up a network bridge and then manually add vm's tun devices to these bridges and then write a shell script that glues it all together. lots of work, very manual, and not impressive. On the other hand if you want to use NAT to KVM+libvirt VMs to the network you just click the new network button in the virt-manager gui and relax. Am I missing "the easy way" of causing a VM to share the physical network with the host?

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• Best way to Start Over on my Dreamhost server?

  - by obsessive

  I have made a mess of my Dreamhost slice and want to know if there's a way to clean install/fresh install/wipe everything and start over? Is there a shell script to do this or would I have to do it through the Dreamhost admin panel or even contact Dreamhost to get them to do it for me? Any advice is appreciated, I'm not sure the best way to proceed. Thanks!

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• Refresh environment variable

  - by lydonchandra

  How can I refresh a Windows cmd shell after I modified my Environment variables? i.e. in bash I can just do "source ~/.bashrc"

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• Is it possible to prevent SCP while still allowing SSH access?

  - by Jason

  Using Solaris and Linux servers and OpenSSH, is it possible to prevent users from copying files using "scp" while still allowing shell access with "ssh"? I realize that 'ssh $server "cat file" ' type file accesses are much harder to prevent, but I need to see about stopping "scp" for starters. Failing that, is there a way to reliably log all SCP access on the server side through syslog?

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• 'less' doesn't clear screen after quit

  - by Dana

  The default behavior for 'less' is to clear the screen after quitting. This behavior stopped when I started using: export TERM=xterm Now 'less' leaves the last page I viewed on the screen, and I want to re-enable the default behavior of clearing the screen. Googling this problem I found that people use the following command in their ~/.screenrc: altscreen on I'm not sure if this is a mac-issue but I don't have this command available. I'm using bash shell on Mac terminal. Thanks!

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• What's the fastest desktop search tools you've used on Windows?

  - by facepalmd

  What do you use to search folders with 1000s of files. Surely not WinExplorer's default search and filter on Vista? If possible, something accessible from within the explorer shell. Else I'm open to any search tool that's consistent and allows me to perform actions on the search results (eg:open file, view file etc);

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• Can I install a clean copy of windows 8 using an upgrade licence key?

  - by Mr. Alien

  Ok so question says it all, I want to buy Windows 8 but don't want to shell out 3.5k for buying a new disc, my friend is already having it. So what I want to know is can I buy an upgrade license which is around 1.99k, and install a clean Windows 8 OS(I want a complete clean install, no upgrading) on my system using my friends Windows 8 disc with my upgrade license or I need to buy a completely new retail copy?

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• Add Clamd as a service to CentOS?

  - by Josh

  As I understand I think I need to add something to init.d, but I am not sure what to add. At the moment to start clamav I have to do clamd start. I would like it as a service so I can start it on run level 3 as a service. I realize I could probably do this through a shell script in the right runlevel, but I would like to be able to use chkconfig to configure it.

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• Failed to start up after upgrading software in ubuntu 10.10

  - by Landy

  I've been running Ubuntu 10.10 in a physical x86-64 machine. Today Update Manager reminded me that there are some updates to install and I confirmed the action. I should had read the update list but I didn't. I can only remember there is an update about cups. After the upgrading, Update Manager requires a restart and I confirmed too. But after the restart, the computer can't start up. There are errors in the console. Begin: Running /scripts/init-premount ... done. Begin: Mounting root file system ... Begin: Running /scripts/local-top ... done. [xxx]usb 1-8: new high speed USB device using ehci_hcd and address 3 [xxx]usb 2-1: new full speed USB device using ohci_hcd and address 2 [xxx]hub 2-1:1.0: USB hub found [xxx]hub 2-1:1.0: 4 ports detected [xxx]usb 2-1.1: new low speed USB device using ohci_hcd and address 3 Gave up waiting for root device. Common probles: - Boot args (cat /proc/cmdline) - Check rootdelay=(did the system wait long enough) - Check root= (did the system wait for the right device?) - Missing modules (cat /proc/modules; ls /dev) FATAL: Could not load /lib/modules/2.6.35-22-generic/modules.dep: No such file or directory FATAL: Could not load /lib/modules/2.6.35-22-generic/modules.dep: No such file or directory ALERT! /dev/sda1 does not exist. Dropping to a shell! BusyBox v1.15.3 (Ubuntu 1:1.15.3-1ubuntu5) built-in shell(ash) Enter 'help' for a list of built-in commands. (initramfs)[cursor is here] At the moment, I can't input anything in the console. The keyboard doesn't work at all. What's wrong? How can I check boot args or "root=" as suggested? How can I fix this issue? Thanks. =============== PS1: the /dev/sda1 is type ext4 (rw,nosuid,nodev) PS2: the /dev/sda1 can be mounted and accessed successfully under SUSE 11 SP1 x64.

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• What's a simple way to list the immediate subdirectories of a given location?

  - by Bribles

  Is there a built-in command or a less verbose way of achieving this? find /var/foo -maxdepth 1 -type d Or should I just make a tiny shell script or function if I'm doing this sort of thing often?

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• vsftp hangs at "150 Here comes the directory listing."

  - by Rikr

  In a vsftpd server enviroment, shared various directories from nfs mountpoints, I can log in without problem, but when I send the first "ls", the vsftp give me the directory listing: lftp [email protected]:~ ls -rw-rw-rw- 1 1160 1016 392 Jun 06 09:28 test.gif but not give me the shell again (lftp client). In the server log I can see that the last message is: "150 Here comes the directory listing." Why happend this?

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• wget 5xx error code handeling

  - by alexus

  i'm running a shell script that uses wget and pulls something over the web, my question is is there a way to tell wget to abort as soon as it hits 500 error code?

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• Is it theoretically possible to toggle hidden files without relaunching Finder?

  - by Andrei

  There are several ways how to toggle hidden files - via shell command, or AppleScript, or Automator action, or even Dashboard widget. All of them close and reopen Finder windows, which is quite annoying. On the other hand, for Open File dialog one can easily toggle hidden files by pressing Command+Shift+Period. Is it possible to avoid relaunching Finder? At least theoretically?

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