General :: Executing A Script In Multiple Subdirectories Simultaneously?
Sep 14, 2010
i'd like to execute in several subdirectories that all have the same name, but I don't want to have to change into each subdirectory (there are hundreds) to execute the script. All the subdirectories have the same name ("final_alignments"), but are located in parent directories with different names. All these parent directories are in the same "super parent" directory. I've tried to do this using "for/do" and "find" but no luck so far.
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Jul 8, 2011
Performing commands in multiple subdirectories simultaneously. I'd like to run a program I've copied into every subdirectory which takes *.in files in the current directory as input files. I can find the program, but how do I tell it to run when I've found it?
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Jul 1, 2011
In my code I want to have two different functions to be executed simultaneously (in parallel) in a single processor system. I tried to use pthreads but they happened to be executed one after another. I have heard about fork, some saying that its no longer recommended since its functions can be achieved by pthreads.
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Aug 23, 2010
I am to rename all the files within a directory (which contains multiple subdirectories) recursively without invalid characters.
I tried the coding posted above.
find . -type f -printf '%p
' | while read file; do
oldfile=$(basename "$file")
newfile=$(echo "$oldfile" | sed 's/[^A-Za-z0-9_.]/_/g')
if [ ! "$newfile" == "$oldfile" ]; then
echo mv "$file" "${file%$oldfile}$newfile"
code....
but I get an error on both of them stating "find: bad option -printf find: [-H | -L] path-list predicate-list"
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Dec 18, 2010
I installed 2 nic cards in my pentium 4 computer running rhel5 to be used as a proxy server and connect 2 computers in each network card for testing . The problem is I cannot ping or use the 2 cards simultaneously . One must be deactivated for the other to be ping . The Network configuration panel indicate both card status as active but i can only ping the first to be activated . I have already set onboot=yes to both cards but still the same result after restarting . The nic cards are onboard - Realtek RTL8139 and pci -3com 3c905b.
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Aug 22, 2011
I am looking for software (Windows or Linux) that can do the following: Resize one image to several provided sizes. Detects the type of the picture (wide, normal) and does the resize based on that. What I mean by that is that it should not break the image by shrinking it more in one direction then in the other so it looks weird. The purpose of this is my Blog. If I want to give my readers a wallpaper, I want to give them several options for the sizes so they can have it in their own preferred screen resolution. The image must however keep its original aspect ratio.
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Nov 18, 2010
This question is very similar to this one except that I want to maintain the file's original subdirectories.
For example if I had
/temp/a/a.txt
/temp/a/a.jpg
/temp/a/b.txt
/temp/b/c.txt
/temp/d/d.txt
/temp/d/d.jpg
/temp/d/e.txt
/temp/f.txt
[Code]...
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Nov 11, 2010
I recently purchased a set of three professional mics and converters for them (they are XLR mics, so i bought three icicles to convert into the USB port)The computer sees all three microphones, but I can figure out how to be able to record on all three at the same time.Is this at all possible, or did I just waste a ton of money on converters?EDIT: I would like to add that these mics are identical, and I'm wondering if nothing else if it's possible to merge the two mount points so that it appears as one micEDIT AGAIN: I have also just installed Pulse Audio Volume Control, and it picks up both mics. How can i tell audacity to use this?
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Oct 22, 2010
I have been working on a project for a while now that involves a rather complex daemon that has to be simultaneously running different tasks. For example one of these tasks is to receive IP packets from the Netfilter queue and place those packets into one of several internal queues. While other tasks involve taking IP packets from those internal queues and processing/manipulating them and finally returning them back to the Linux network stack.
As I as I have no previous C experience before starting this project I just spawned a new thread each time I needed the daemon to be doing something else while those other tasks continued to run. Is there any other way of doing this or is this pretty much the only way of doing this? Because C is procedural I could not figure out any other way of doing accomplishing what I wanted. Should I have done it some other way or is this the correct and only way I could have gotten my C app to be running multiple tasks at the same time?
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Sep 21, 2010
I'm trying to write a bash script that will simultaneously ping a host and execute a traceroute at the same time. I would like the results to output to a text file.
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Apr 27, 2011
I have a list of approximately 50 words that I'd like to search documents for and delete those words. I was wondering if there is some type of automated process for removing multiple words rather than me manually putting each word into 'find and replace'
On that note I guess I could write the Macro in python if there isn't anything out there that does this. However I read that open office only works with python 2.3.5 or something of that nature, and I have already installed 3.1. Is that still going to be an issue?
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Oct 5, 2010
Here's the setup: One x86 server (Red Hat 4) with two serial connections to an embedded linux device. One serial connection is to a power control so the device can the restarted, and the other is used for a console to this device. Both serial connections use minicom. People on my team VNC to the x86 server, where they find the two minicom sessions waiting for them as they are left open. I would like to automate connecting to the server and communicating over the serial lines.
Supposing I use ssh to the x86 server, could minicom be used over the serial lines without terminating the minicom processes seen through VNC? If not, is there a way to re-open those windows from within the ssh session, so a user who VNCs to the server won't have to reopen them? Could a single ssh connection control two minicom terminals simultaneously, or would there need to be two ssh connections? It is assumed a user and the automated process will *not* try to access the device at the same time; the automation would trigger during off hours.
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Aug 5, 2010
i want to copy one or more files or directory from one drive to multiple drive simultaneously. It like a cloning a disk. But i dont like clone entire disk. i want to copy/clone only certine files or folder. if any one can know how to copy one source to multiple destination simultaneously.
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Jun 9, 2011
Is it possible to output one playback stream to multiple devices simultaneously with the current PulseAudio / Phonon setup? The PulseAudio mixer only has radio buttons to choose one device per playback stream. I believe the hardware is capable of this, since I remember doing that before we had PulseAudio. How can I duplicate an audio stream?
Here's one application scenario: I am travelling with my family, all crammed in small hotel room. My wife and me want to watch a movie on my laptop without waking up our kids. I just happen to have one analogue headphone available and one wireless USB headset with me. (Of course, the low tech solution is to bring an 3,5mm Y-cable to attach two analogue headsets, but I would really love to use the USB headset together with the analogue one.)
Another similar thing that bugs me is that my laptop's built-in speakers now always seem dead when an analogue headphone is plugged in. This is mostly what one wants, and before PulseAudio, one had to manually switch them off which was generally annoying. However, the downside is for example with notifications.
For example, before PulseAudio, I could configure Skype to always ring over the laptop's built-in speakers, regardless of whether the analogue headphones were plugged in. This is no longer possible, since PulseAudio does not distinguish between built-in speakers and built-in analogue port any more, while old Alsa did. So in my office, where some analogue headphones are plugged into the docking station, I never hear Skype ringing if I don't wear the headphones.
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Jul 15, 2010
I installed 4 encrypted partitions (/, /var, /tmp, and swap) that are mounted at boot using the Alternate Installation Disc, and they all have the same password, but I have to type that password in 4 times when booting up. How do I make it so I only need to type in my password once?
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Aug 18, 2010
I looked through google but can't find an answer for this..... say I have a directory called "files"; this directory contains several other directories..... what I wanna do is delete ALL the files within the subdirectories, but NOT delete the subdirectory. Can this be done easily without having to run a command for each subdirectory?
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Dec 9, 2010
Is there an easy way to create all subdirectories of a path in linux ?
Something like
mkdir /a/b/c/d/e/f
executed in / should create directories a,b,c,d,e,f
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Jul 19, 2010
When I installed a new copy of my distro on another partition, in order to preserve all the settings from my old my user account, I made a user account with the same name on the new installation, and then copied my old user account's files (in their entirety) to the new user account, overwriting it. I did the copying from the root account (where else? I assume the new user account can't overwrite itself while it's open), and root became the owner of everything I copied, making it impossible to open the new user account. So I then chowned the new user account's folder to myself. I still can't get in, because apparently, chown only chowned the top folder, leaving all subdirectories owned by root. How do I make chown include all subdirectories? I scanned the man page, but didn't see a parameter.
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Feb 22, 2010
How can I remove all .swp files in all of my subdirectories under Linux?
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Jan 24, 2011
1. How can you find all first level subdirectories under the current directory?
2. How will you show the last 100 lines of the file "foo.log"?
3. How will you Stream the contents of a the log file "foo.log" as it gets written to?
4. How can you grep for a pattern on a gzip'ed file? e.g., find "foo" in bar.gz
5. Find all lines in the file "foo" which DON'T have the pattern "bar"
6. Your web server is running very slowly. If you can login to the server, what command will you run to find out cpu and memory use?
7. Extract the file foo which is a part of the tar'ed, gzip'ed file bar.tar.gz
8. You attach a usb disk to your linux desktop, but it does not show up. How can you get more information about the error?
9. What is the secure way to login to remote systems?
10. What is the difference between TELNET and SSH?
11. Given a file 'a' with the following permissions -rwxrwxrwx 1 rohit rohit 0 2011-01-24 13:30 a Change its permissions such that it is only readable and writable by its owner, not accessible by anybody else in the group and only executable by the world
12. Difference between using ' and " for quoting a string / command in a shell
13. In the attached text file (test.txt) replace all occurrences of 'red' with 'yellow' without using an editor (i.e. from the command line)
14. How would you suppress output written to stderr by a command
15. Meaning of the #! notation in scripts e.g. #!/bin/sh
16. What is the output of the attached shell script test.sh Scripting questions, all based on the attached file access.log. Use one of perl, python, ruby, or shell scripts to solve these questsions. If any answer is obtained using just the command line, please include those commands as well.
17. How many accesses were made between 10am and 11.30am on Jan 24, 2011?
18. How many unique IP addresses accessed this server?
19. For every IP address which accessed this server, output a report showing number of hits for every type of HTTP status. For e.g., IP 192.168.1.20 has 164 hits with status 404 and 1690 hits with status 200.
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Aug 5, 2010
I have .jpg files in many subdirectories from where I need to copy all the images from all the sub directories and paste them to a specific directory.I have used `cp -rf *.jpg media/sik/` which only copies the .jpg files of the directory in which I was working.
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Feb 7, 2011
I am a noob and I am trying to display a count of the number of subdirectories in a directory. I have been able to use find -type d to list directories and subdirs but I want a numerical value of dirs and subdirs. I know ls -l gives a count but when I try ls -l -d all it shows is "." I also have tried a combination with the -R option but nothing seems to be working for me.Please forgive my ignorance but I am working on a script for class and this is the first step.
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Feb 11, 2010
I'm able to use the following to remove the target directory and recursively all of its subdirectories and contents. find '/target/directory/' -type d -name '*' -print0 | xargs -0 rm -rf
However, I do not want the target directory to be removed. How can I remove just the files in the target, the subdirectories, and their contents?
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Aug 10, 2010
I need to give a user write access to /var/www and its subdirectories. The current directory permissions are as follows:rwx r-x r-x root root
I added the user to the root group but that didn't seem to help.I read I could chmod -R to change the access to write for the www directory and subdirectories but I don't want to change things and mess up the website. How can I give the user access to write to the www directory and subdirectories without messing anything up? Would changing the www directory group owner to his group cause an issue anywhere?
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Jul 27, 2010
I'm looking to get a shell script to loop through a number of directories and subdirectories,looking for files that contain a particular substring, and renaming the file by replacing the search string with a different substring. For example if you had a directory full of folders that contained digital photos (along with various other files which would need to remain unaffected), and the intent was to remove the "DSC_" prefix from several thousand files buried within. I've whipped up a rather long-winded solution that works well for this purpose but chokes on directory names with spaces. I am reasonably sure there's a 2 or 3-liner that would accomplish this exact same task.
function investigate
{
path=$1
for file in `ls $1`
#for file in *
[code]....
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Jun 7, 2010
tell me the command used to find a specific word in directories and sub-directories in linux?
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Mar 24, 2010
I am trying to write a very simple script that will go to every subdirectory of a single directory and run a command (lets call it make_ndx).I know I can write this the long way with in a text document with something like:
cd /"the directory"/"the 1st subdirectory"
make_ndx
cd ..
cd "the 2nd subdirectory"
cd ..
Alternatively, I also tried: for i in 'find /path/somemorepath -type d -mindepth 1'; do cd $i; make_ndx -f *.gro; done which returns me with the error cd: find: no such file or directory. But if I run the find command by itself to test if I am calling the right directories, it gives me the exactly the output I am looking for. Any ideas? Should I just write the find results to a file and loop through the contents of the file (which seems a little bit like overkill) or am I just making a simple typographical mistake and I am just not seeing it?
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Oct 11, 2010
How can I allow normal users to mount a tmpfs under any subdirectory owned by them?
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Jun 10, 2010
I need to copy all subdirectories and files from one directory to another ever 5 minutes or so, with the old data automatically being overwritten with the new data. I'd also like this to run at startup. Is there any way this can be done? If so, what program would I need to schedule the automation and what is the command line I would need.
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Mar 14, 2011
I have two networks on a server. One being my internal network, and the other being an external IP address. This is on Debian Lenny. Here is my /etc/network/interfaces file:
I can reboot my system and sometimes eth1 is accessible from SSH, and other times eth0 is accessible. Then sometimes eth1 will just stop being pingable alltogether. This is a fairly fresh install of Debian, and the only thing I have running is VMWare Server 2.0, bridged to both of my network connections.
Here is what my route looks like:
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