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• Text Terminal Hardware (for Linux)

  - by DLH

  Is there any way to obtain a hardware text terminal (preferably small in size) with a screen and a keypad to connect to a Linux machine (preferably via usb)? I'd like to be able to log into a command line and do some work there while simultaneously running a graphical environment on the main display. It seems like there should be some kind of lcd screen and qwerty keypad device designed for this purpose. Does this exist, and how do I get one? Edit: I'd be happy with a small networked device as well, as long as I could get a remote terminal into my computer.

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• Video Thumbnails using ffmpeg

  - by LenzM

  I'm looking for a nice short easy way to create a series of thumbnails for any given video file. I'm almost there using ffmpeg, here's what I have: ffmpeg -i /tmp/video.avi -r 1 -ss 60 -r 1 foo-%03d.jpeg` The only problem is that this takes a shot every second and I'd like to make it every minute or so. I tried setting the -r value to 1/60 or .02 to no avail. For reference, here's the old script I was using that only worked for some files: #!/bin/bash # grab a screenshot every 60 seconds file=$1 orig_dir=`pwd` mins=`exiftool "$file" | grep "Duration" | awk -F : '{print $2}' | grep --only-matching '[0-9]*'` dir="$file-screenshots" mkdir "$dir" cd "$dir" mplayer -vo png -vf screenshot -sstep 60 -frames $mins -ao null "../$file" cd "$orig_dir" This doesn't have to be on the command line, it's just that it always ends up being easiest.

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• Screen startup apps

  - by stillinbeta

  I know that most people don't bother with things like screen anymore, but I happen to really like it, even in this GUI day and age. I still do most of my development from a BASH prompt, so it's extremely useful to me. What I'm wondering is what the easiest way is to start an instance of screen (stored in a shell script or .screenrc or somewhere else) so that it starts up with set commands already running in set windows. For example, I use a django test server, so I'd like one window to come up running "python manage.py runserver" and another blank, waiting for commands. The man page is wholly indecipherable. These old unix utilities can do quite nearly everything, so I'm sure this is possible, but I can't for the life of me figure out how. I

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• Batch processing multi-TIFF in Irfan view

  - by hemalshah

  I have to convert DPI of more than 5k Tiff images on a monthly basis from 200x200 to 100x100. I can do that in Irfan view using a .bat file that i have created.. the following is the .BAT file code @"c:\program files\irfanview\i_view32.exe" "e:\batch1*.tif /aspectratio /resample /tifc=4 /dpi=(100,100) /convert=e:\batch2*.tif" %* Where tifc=4 is Fax 4 compression However, the above code doesn't help me change the DPI for other pages except for Only the first page in the tiff thats getting converted to 100 DPI. Rest all pages are still 200 DPI. I am using WinXP Professional and Irfan View. Can anyone tell me what I am missing. Or any other alternative program where I can create a .bat file and run the batch process using Command line?

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• How to avoid tilde ~ in Bash prompt?

  - by Jirka

  Hello! I have set my prompt in bash in a such way that I can use it directly in scp command: My current PS1 string: PS1="\h:\w\n$" And the prompt looks like this: lnx-hladky:/tmp/plugtmp $ What I don't like at all is the fact that $HOME directory is displayed as tilde. Can this be avoided? It's causing problems when switching between different users. Example: lnx-hladky:~/DOC $ Documentation says: \w : the current working directory, with $HOME abbreviated with a tilde \W: the basename of the current working directory, with $HOME abbreviated with a tilde Is there any possibility to avoid $HOME being abbreviated with a tilde? I have found one way around but I feel like it's overcomplicated: PROMPT_COMMAND='echo -ne "\e[4;35m$(date +%T)\e[24m$(whoami)@$(hostname):$(pwd)\e[m\n"' PS1=$ Can anyone propose a better solution? I have a feeling it's not quite OK to run so many commands just to get prompt. (date,whoami,hostname,pwd). Thanks a lot! Jirka

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• Giving PHP the permission to make a git pull request

  - by Bernd

  Hello, I would like to allow PHP to execute a Git pull command. But there are some problems with the user and permissions. How did you solve the problem? PHP runs as user www-data. Therefore I've changed the .git directory owner/group to www-data (chown www-data:www-data -R .git). As it is turned out later www-data has no SSH keys. Is it a good idea to give it one? If yes where to place? Or is it possible to allow it to use a specific key. Best regards, Bernd

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• How-to: determine 64-bitness of Windows? [closed]

  - by warren

  Possible Duplicate: Tell the version of Windows XP (64-bits or 32-bits) Is it possible to determine whether a given installation of Windows is 32- or 64-bit? From right-clicking on My Computer, and selecting Properties, it appears that such information is not readily available. Typing ver at the command prompt also doesn't seem to return anything about the nature of the platform in which it is installed. Under Linux, I'd use uname -a to find out what kernel was running. Is there an analog on Windows?

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• Running Mac OS X 10.6 my users home directory is wrong

  - by Erik Miller

  Somehow my home directory on my Mac has been changed and I'm not sure how to go about changing it back, I'm more of a linux guy and Mac OS X has some other mechanism for storing that information. Basically when I log into the machine normally than start a terminal window. I start in the /Users/erik_miller directory, which is my home directory, but when I run some this like cd ~ The machine tries to change to /Users/erik_miller. Yes, the same path with a period on the end. I can change my $HOME environment variable for the session, but the next time I start the machine it reverts. So, I think if I can find where that information is stored I can just change it there and hopefully all will be well.

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• Can I "reprogram" an American Express USB drive?

  - by SkippyFire

  I recently received a USB drive that looks like a credit card as a promotion. The drive portion flips out to plug it in. When you plug it in, it opens the run dialog, and opens a URL to an American Express web page. I was able to find it in the Device Manager: But I don't know what else to do? Is there a way I can convert this into a plain old USB drive? Or better yet, can I modify the command that it runs when inserted into a computer?

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• Giving PHP the permission to make a git pull request

  - by Bernd

  I would like to allow PHP to execute a Git pull command. But there are some problems with the user and permissions. How did you solve the problem? PHP runs as user www-data. Therefore I've changed the .git directory owner/group to www-data (chown www-data:www-data -R .git). As it is turned out later www-data has no SSH keys. Is it a good idea to give it one? If yes where to place? Or is it possible to allow it to use a specific key. Best regards, Bernd

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• Recursively move files in sub-dirs to new sub-dirs of same name

  - by Gabriel

  I have a batch of files all ending with the same string, ie: *_ext.dat located in several sub-dirs along with several other files, in a given main dir. This is the structure: /main_dir/subdir1/file11_ext.dat /main_dir/subdir1/file12_ext.dat /main_dir/subdir1/file13_ext.dat /main_dir/subdir1/file14_other.dat /main_dir/subdir1/file15_other.dat /main_dir/subdir2/file21_ext.dat /main_dir/subdir2/file22_ext.dat /main_dir/subdir2/file23_ext.dat /main_dir/subdir2/file24_other.dat /main_dir/subdir2/file25_other.dat /main_dir/subdir3/file31_ext.dat /main_dir/subdir3/file32_ext.dat /main_dir/subdir3/file33_ext.dat /main_dir/subdir3/file34_other.dat /main_dir/subdir3/file35_other.dat I need to recursively move only the files ending in *_ext.dat into a new main dir, new_dir, respecting the sub-dir structure so the files will end up in an equivalent dir structure like this: /new_dir/subdir1/file11_ext.dat /new_dir/subdir1/file12_ext.dat /new_dir/subdir1/file13_ext.dat /new_dir/subdir2/file21_ext.dat /new_dir/subdir2/file22_ext.dat /new_dir/subdir2/file23_ext.dat /new_dir/subdir3/file31_ext.dat /new_dir/subdir3/file32_ext.dat /new_dir/subdir3/file33_ext.dat Because of this the command should also create those sub-dirs with their corresponding names. I know that with a line like this one: find . -name "*_ext.dat" -print0 | xargs -0 rm -rf I can delete all those files, but I don't know how to modify it to do what I need (or if it is even possible).

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• Sane(r) way to get character-encoding of CLI?

  - by danyowdee

  Hi all! I was writing a CLI-Tool for Mac OS X (10.5+) that has to deal with command-line arguments which are very likely to contain non-ASCII characters. For further processing, I convert these arguments using +[NSString stringWithCString:encoding:]. My problem is, that I couldn't find good information on how to determine the character-encoding used by the shell in which said cli-tool is running in. What I came up with as a solution is the following: NSDictionary *environment = [[NSProcessInfo processInfo] environment]; NSString *ianaName = [[environment objectForKey:@"LANG"] pathExtension]; NSStringEncoding encoding = CFStringConvertEncodingToNSStringEncoding( CFStringConvertIANACharSetNameToEncoding( (CFStringRef)ianaName ) ); NSString *someArgument = [NSString stringWithCString:argv[someIndex] encoding:encoding]; I find that a little crude, however -- which makes me think that I missed out something obvious...but what? Is there a saner/cleaner way of achieving essentially the same? Thanks in advance D

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• Passing a file with multiple patterns to grep

  - by Michael Goldshteyn

  Let's say we have two files. match.txt: A file containing patterns to match: fed ghi tsr qpo data.txt: A file containing lines of text: abc fed ghi jkl mno pqr stu vwx zyx wvu tsr qpo Now, I want to issue a grep command that should return the first and third line from data.txt: abc fed ghi jkl zyx wvu tsr qpo ... because each of these two lines match one of the patterns in match.txt. I have tried: grep -F -f match.txt data.txt but that returns no results. grep info: GNU grep 2.6.3 (cygwin) OS info: Windows 2008 R2 Update: It seems, that grep is confused by the space in the search pattern lines, but with the -F flag, it should be treating each line in match.txt as an individual match pattern.

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• How do I send email with sendmail to external hosts?

  - by Jake

  If I wanted to send an email to a user on the same linux machine, I can run: echo -e "Subject: Foo\n\nBar\n" | sendmail -v jacob But if I run: echo -e "Subject: Foo\n\nBar\n" | sendmail -v [email protected] It will give me the error: 050 >>> MAIL From:<jacob@mu> SIZE=321 050 550 5.1.8 Cannot resolve your domain {mx-us011} If my machine has access to the internet but is behind a router and has no domain associated with it, can I use sendmail to send mail to this address? Do I need to connect through an SMTP server? Can I do that with sendmail? If I use sendmail's -f option and put my gmail account there it will work. Can (or should I) I use my IP address? echo -e "Subject: Foo\n\nBar\n" | sendmail -v -f [email protected] [email protected] I'm a bit lost on how all this comes together in sending mail from the command line.

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• How to recursively move all files (including hidden) in a subfolder into a parent folder in *nix?

  - by deadprogrammer

  This is a bit of an embracing question, but I have to admit that this late in my career I still have questions about the mv command. I frequently have this problem: I need to move all files recursively up one level. Let's say I have folder foo, and a folder bar inside it. Bar has a mess of files and folders, including dot files and folders. How do I move everything in bar to the foo level? If foo is empty, I simply move bar one level above, delete foo and rename bar into foo. Part of the problem is that I can't figure out what mv's wildcard for "everything including dots" is. A part of this question is this - is there an in-depth discussion of the wildcards that cp and mv commands use somewhere (googling this only brings very basic tutorials).

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• mv directory to overwrite another

  - by gbjbaanb

  I may be going bonkers here, but I'm trying to move a directory to a new location, overwriting the contents (on Linux, using bash). Everytime I try it, it responds with "mv: cannot move `./src' to a subdirectory of itself" eg. I have: /src /new/dir/src /$ mv src/ new/dir/ If I delete the destination dir, then it works. I know I can move the contents of the source dir to overwrite the destination, but I'd like to use the same command to overwrite the destination if it already exists, or move the source if it doesn't.

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• how to word wrap, align text like the output of man?

  - by cody

  what is the command that word wraps and justifies a text file so that the output looks like that of a man page: All of these system calls are used to wait for state changes in a child of the calling process, and obtain information about the child whose state has changed. A state change is considered to be: the child terminated; the child was stopped by a signal; or the child was resumed by a signal. In the case of a terminated child, performing a wait allows the system to release the resources associated with the child; if a wait is not performed, then the termi- nated child remains in a "zombie" state (see NOTES below). Thanks.

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• icacls in windows 7 does not give full permission to write files in root drive

  - by Menuta

  icacls in windows 7 does not give full permission to write files in root drive. We have a very old application based on Omnis7 that needs to create and read/write files on drive C: when running as a restricted user. In Windows XP to give this permission is quite trivial using cacls. cacls C:\ /G Everyone:(C) The equivalent icacls in Windows 7 will not work. icacls C:\ /Grant Everyone:(M) I have also tried the following. icacls C:\ /Grant Everyone:(F) icacls C:\ /Grant Domain\user:(F) trying to create file with a restricted user gives this C:\>copy nul text.txt Access is denied. 0 file(s) copied. After applying the icacls permissions above the result changes to this. C:\>copy nul text.txt A required privilege is not held by the client. 0 file(s) copied. Is this an issue with the way I am applying the permissions? Or is Window 7 being extremely strict?

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• Can I find the session ID for a user logged on to another machine?

  - by Dan Tao

  I want to open an application on another computer on the same network via the command line. The scenario here is that the user is in a room surrounded by about 20 computers and wants to be able to launch the same app on every computer without walking from screen to screen opening it up on each individual machine. I've discovered that I can get the basic functionality for this using PsExec as follows: psexec \\[computer] -u [username] -p [password] -d -i [SessionID] [program] For computer, username, password, and program, I'm good. Does anyone know of a way I can figure out which SessionID is assigned to a particular user logged on to a particular machine on the network? Alternately, is there a better way to go about what I'm trying to accomplish?

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• How to display certain lines from a text file in Linux?

  - by Boaz

  Hi, I guess everyone knows the useful Linux cmd line utilities head and tail. Head allows you to print the first X lines of a file, tail does the same but prints the end of the file. What is a good command to print the middle of a file? something like middle --start 10000000 --count 20 (print the 10,000,000th till th 10,000,010th lines). I'm looking for something that will deal with large files efficiently. I tried tail -n 10000000 | head 10 and it's horrifically slow. Thanks, Boaz

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• Is it possible to set the name of the current virtual desktop via commandline?

  - by Dave Vogt

  The utility wmctrl has the possiblity to list the names of all virtual desktops: % wmctrl -d 0 - DG: 3360x1200 VP: 0,0 WA: 0,0 3360x1199 Mail / Comm 1 * DG: 3360x1200 VP: 0,0 WA: 0,0 3360x1199 Web / Docs 2 - DG: 3360x1200 VP: 0,0 WA: 0,0 3360x1199 A 3 - DG: 3360x1200 VP: 0,0 WA: 0,0 3360x1199 B I would like to be able to change, from the commandline, the name of the current desktop to something else. This is possible by using some pagers, for example, but I couldn't find out how to do it from the command line. Update: the xprop utility seems to be able to set the desktop names, but I could not figure out the exact format to do so, yet: % xprop -root -f _NET_DESKTOP_NAMES 8s -set _NET_DESKTOP_NAMES asdf % xprop -root _NET_DESKTOP_NAMES _NET_DESKTOP_NAMES(UTF8_STRING) = "asdf", "Web / Docs", "A"

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• How to scroll up and look at data in GNU screen

  - by dorelal

  I am using a mac (snow leopard). I am a ruby on rails developer and I watched a screencast on GNU screen and am trying it out. So far I like it. On a window when I start server I get to see the log messages. However I can't seem to scroll up. I do get a scroll bar. However when I use the scroll bar and scroll up I don't see anything. How do people use GNU screen and scroll up?

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• Scripted printer configuration changes

  - by David Steven

  I've got about a dozen Windows XP machines that I need to make a couple specific printer configuration changes to. The printer is "virtual" printer for an electronic delivery service. I'd like to not have to visit each machine individually. I already have the means to execute commands remotely on the machines, I just can't seem to find away to adjust these settings via command line or script. Specifically I need to be able to make the following changes: 1) As an admin user: - Device Settings - Font Substitution Table/Courier New - Change to "Courier" 2) As a specific* user: - Printer Preferences - Paper/Quality - Advanced - Change Graphic/Print Quality to "600 x 600" - Change Document Options/Printer Features/Graphics Mode to "HP-GL/2" *This change is a per user configuration, unless there's some way to make it once. In this situation I only really need it for a specific (different) user on each machine.

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• Rsync plugin to many local wordpress installs via script or cli

  - by Nick Abbey

  I am maintaining a large number of wordpress installs on a production server, and we are looking to deploy InfiniteWP for managing these installs. I am looking for a way to script the distribution of the plugin folder to all of these installs. On server wp-prod, all sites are stored in /srv//site/ The plugin needs to be copied from ~/iws-plugin to /srv//site/wp-content/plugins/ Here's some pseudo code to explain what I need to do: array dirs = <all folders in /srv> for each d in dirs if exits "/srv/d/site/wp-content/plugins" rsync -avzh --log-file=~/d.log ~/plugin_base_folder /srv/d/site/wp-content/plugins/ else touch d.log echo 'plugin folder for "d" not found' >> ~/d.log end end I just don't know how to make it happen from the cli or via bash. I can (and will) tinker with a bash or ruby script on my test server, but I'm thinking the command-line-fu here on SF is strong enough to handle this issue much more quickly than I can hack together a solution. Thanks!

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• How to start wuala on the linux commandline with auto login

  - by mit

  When i start wuala on the linux commandline like this, it logs me in and the folder is mounted: wualamcd login username password enableAutoLogin I can shut it down from another console typing wuala shutdown But how do I actually use the auto login that I just set using the enableAutoLogin switch? What is the command to start it again, so it logs in but does not need the password? I tried wualamcd login and wuala starts but no one gets logged in. Auto login in gui mode works fine. This is 32 bit linux with openjdk 6 JRE.

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