Ubuntu :: Can't I Pipe Into The 'file' Command?
May 9, 2010
I'm looking for an mp3 file in the firefox cache folder.I was thinking I could run the command 'find -size +2M' and pipe that output into the 'file' command to tell me which is an mp3, something like thisfind -size +2M | fileBut this doesn't work, what am I doing wrong?This is output Usage: file [-bcikLhnNrsvz0] [-e test] [-f namefile] [-F separator] [-m magicfiles] file...file -C -m magicfilesTry `file --help' for more information.
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Apr 22, 2010
My question deals with me creating a name pipe (file) in the my /group directory called chat.I then have to write a script to read from the named pipe and save data into a file called chat.log until the words End of File are passed to the program.
-When I created the named pipe file (chat) I used the mknod chat p command..Is this the correct command to create a named pipe file? -Then I'm having trouble with my script and how to make it run until the words End of File are entered in. This is what I have so far.
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Aug 11, 2010
I understand that $! is the PID of a command. For example:
Code: #!/bin/bash
myprogram &
echo "PID of myprogram is $!"
I'd like to send the output of "myprogram" to both console and to a log file using the "tee" command but I also want to store the PID of "myprogam". Something like this:
Code: #!/bin/bash
myprogram | tee ./logfile &
echo "PID of myprogram is $!"
The problem is that $! is now the PID of "tee" rather than the PID of "myprogram".
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Jul 21, 2011
I need to pipe the output of date command, to form a command like this:
mycommand -f 20110721
where 20110721 is current YearMonthDay.
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Mar 2, 2011
I've written a simple server in linux used fork to create a FIFO pipe.The server create two FIFO pipe.One for server read data from client and write data to client.Then another pipe for client read data from server and write data to server.When the server read data from a client used server-pipe and then write data to client.But ,if the client no read open the pipe,the server side write will be crashed because of a broken-pipe SIGPIPE. How to check whether the read side is opened?Or,how to catch the SIGPIPE,and then my server will still execute on,not crashed!!
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Jun 29, 2010
How can I pipe the output of a shell command into a new buffer in Vim? The following obviously wouldn't work, but you can see what I'm getting at:
:!echo % | :newtab
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Sep 30, 2010
Is there a way to process the output of a locate command on the spot within bash. The output is 3 lines, ex:
Code:
[root@server confluence]# locate .timestamp
/opt/confluence/confluence-persistent/index/.timestamp
[code]....
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Dec 2, 2010
When I give the command:
winexe --interactive 0 --user <user>%<password> //<ip_address> 'cmd /C dir'
I receive the message:
ERROR: Cannot open control pipe - NT_STATUS_ACCESS_DENIED
The source machine is a RedHat EL4 server. The target machine is a Windows XP Home SP3 pc. When I give the same command to another pc all works fine. The other pc is a Windows XP Prof SP3.
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Apr 10, 2009
I'm doing ping between 2 RH servers through a VPN site2site tunnel and in some times I got in the result pipe 2 and another pipe 3 as I mark it in blue color below.
e.g.
64 bytes from 192.168.1.10: icmp_seq=0 ttl=128 time=0.229 ms
64 bytes from 192.168.1.10: icmp_seq=1 ttl=128 time=0.287 ms
64 bytes from 192.168.1.10: icmp_seq=2 ttl=128 time=0.278 ms
[code]....
What's the difference between pipe 2 and pipe 3 and what's the meaning of it?
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May 13, 2011
Have this script which is reading in a series of files, one at a time with while-do-done loop, each file goes through various greps/awk's where this info is then saved to various files for later use. i.e....
Script is being run on Linux Red Hat,
In one of the grep/awk's the output (currently) are 2 columns (min max), i.e....| awk '{print $1, $2}' | sort -u which outputs (e.g.)
The number of "min max" pairs varies from file to file. Want to output a single column of unique numbers from the min max pairs & get the number of them for input to a file...i.e...
Where <PROCESS> is some process/technique that will generate a single column of integers (increment of 1) to pipe into the next one (sort -u)
i.e. (example from above)
Have tried command seq - only works for single pair input i.e.
Is there any command like seq etc which will output a single column based on a input of min max numbers (increment 1) to pipe onwards to next command?
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May 3, 2011
I want to pipe the output of ls in a folder to a file (lets call it test.txt) but when i do so, but when i do ls > test.txt in test.txt there is also test.txt (logical
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Oct 7, 2010
Im running Ubuntu server 10.04 lts
Im trying to get postfix to receive mail from one address and pipe it to a PHP file for a help desk software called Trellis Desk.
They recommended that I use Cpanel but its not free and my boss is not willing to pay for it. I need a free solution.
I know my way around Linux but Im no professional
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Aug 19, 2009
I have a bug where WoW under wine is crashing my computer, and I want to get the data from the console, so I want to put it in a file, but I don't know how! None of the piping tutorials online helped at all.
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May 26, 2011
I'm storing a list of strings in a file and would like to read the file and pipe each line returned to grep which in turn searches a directory for files containing the string.However this is not returning any output.
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Aug 9, 2011
is there a way to pipe a video feed from virtual box to vlc and save it as a file? cause if i could then i could save streaming videos from places like hulu and netflix or save bluray movies to a avi file for latter use.
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Sep 16, 2010
I am tying to read a file in with nawk whilst trying to take input from a pipe. I've come across the getline option and no matter how hard I try, I can't figure out the correct syntax. What I want to do is to take some input from the pipe and make a comparison with all of the values in a file and print a match.
Code:
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Jul 12, 2011
What is a pipe? and why a file is a named pipe? I am just learning linux.
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Jul 26, 2010
have some problems in doing my project, my project title is ' in investigate into implementation of certification authority with small network ' ( with using Postfix, openSSL ) and i have builded up two different networks using debian and after that i need to make a mail server, so i configured Postfix and made a mail server, i can send and receive emails on both networks. now i need a shell script on received emails using Postfix, like mail is coming from outside then will go to pipe and there should a script in bash, that will run and check the email and deliver to others, or throw it away some thing like that... here are some links where i was looking
[URL]
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Apr 24, 2011
Does any one know how can i input text by reading from a named pipe to any popular GUI based text editor?
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Sep 26, 2010
I have a pipe delimited flat file, field 27 is price. I would like to move items marked sold to a new file every couple months.
awk -F"|" '$27 == "SOLD" {print $0}' awktest2.data >> awkout2.data
Allows me to write line to new file but I need to delete the original line, I also want to make sold case insensitive tried [Ss][Oo] with no luck
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Jul 3, 2009
I am using openSUSE 10.3.When I install software from tarball then to record time required I send output of date to beg.txt(when installation begins) and end.txt (when installation finishes).How can I append output of date to a file so I don't need two files?
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Oct 28, 2010
I would like to convert a .ods file to a .csv file via command line on a server running ubuntu with no graphical interface.
xls2csv does a perfect job on xls files; is there something similar for ods files?
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May 3, 2010
My .jar file needs and uses some files in the same directory it's in (everything, including the jar was unzipped into said directory). It runs perfectly when I do java -jar file.jar in the command line, but there's trouble when I double-click the file when running from the file system manager. I've tried a custom command under properties ie java -jar, but the problem is that the .jar file doesn't seem to be able to use any of the files in the same directory. When running, the jar can't find any of the files that it needs.
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Aug 23, 2011
I need to be able to convert HTML email messages saved as text files (.eml or .msg) to PDF documents, one PDF per email, retaining formatting and images.
Are there any Linux tools that will allow me to do this from the command line (so it can be scripted)?
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Oct 14, 2010
I want to be able to check the contents of a text file for a specific string and remove it from the file from the command prompt. I would basically be searching through a number of files and if a specific string is found I would like it removed automatically. pretty much a find and replace, were the replace is nothing. any one got any ideas on how you would do this. I already have the search part sorted just need to be able to remove the string I don't want from the multiple files.
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Nov 23, 2010
As in windows all the delted items will got to RecycleBin is there any such thing in linux.
(Or)
Can we retrive the file which got removed from file system(using rm command)
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Nov 28, 2010
I'm trying to set a shortcut using the pipe key ("|", this one...) like "<Ctrl>|" and no luck. Is there any special way to set this like <Ctrl><Pipe> or <Ctrl>|| or something?
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Mar 9, 2011
I am trying to grep multiple numbers from file, grep does have the -f option for that.
Code: grep -f <`seq 500 520` /etc/passwd I know this could be done with
Code: for i in `seq 500 520`; do grep "$i" /etc/passwd; done But my question is fare more behind this example. It is possible to redirect one command output which will be treat as a content of file for another command ?
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Jan 13, 2010
I want to kill a specific program with the kill -9 pid in a hole command. How do I pipe and kill the output from this command? pidof transmission |
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Dec 9, 2010
I'm a UK based user and using a standard UK keyboard (Coleman based layout I think) although I have a backslash (to the left of the "Z", I can't type the character in any application. This is very frustrating when typing FQDNs amongst other things. How can I enable the backslash key for use with UK keyboard layouts. BTW I have tried all of the UK keyboards suggested in the keyboard layout dialogue
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