General :: Calling A Script And Giving It A Variable?
Apr 22, 2011
I have a script1.sh (see code below) which calls another script (which is a sort of template -> template.sh). But when i call template.sh i need to send an argument with it.
Code:
#!/bin/sh
VAR=`./template.sh -d $dirpath`
exitstatus=`echo $VAR`
[code]....
echo "$VAR files which are older than 1 hour in folder $dirpath" exit $exitstatus I geuss the command should look like something like this command
Code:
./script1.sh -d /
You don't have to look at the code of template.sh, thats not important. I just need to know how i get this to work I don't think it's that hard, but i just can't see it ...
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Feb 19, 2010
I am having some weird problems with calling commands stored in a variable (I need to do this to assemble a command with a bunch of parameters automatically and then execute it).Example code that will replicate the weirdness:
$ echo "hello world" > "test file.txt"
$ cat "test file.txt"
hello world
[code]....
I would expect the output to be:
hello world
What happens to the quotes? I have tried various combinations of single quotes, escaped quotes, etc, but it seems like quotes in a variable are not evaluated as quotes when that variable is executed.
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May 3, 2011
I'm trying to call a specific variable based on a user selection. For example:
Code: Select a file:
[1] foo.tar
[2] bar.tar
Enter a selection: I have already coded each possible selection to have its own variable. If the user selects 2 I need to select $SELECTED_TAR2, or if they select 1 I need to select $SELECTED_TAR1 and then do something like this behind the scenes:
Code: cp /home/user/$SELECTED_TAR2 /home/user/backup/$SELECTED_TAR2
I was thinking something like this:
Code: echo "Enter a selection: "
read -e SELECTED_NUMBER
cp /home/user/$SELECTED_TAR$SELECTED_NUMBER /home/user/backup
[code]....
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Oct 4, 2010
I am calling a bash shell script from a python script trying to pass several arguments to the bash script with no succes can this be done? I have researched (google) with no clear indication of how to achieve this. Using "os.system"
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Nov 19, 2008
suppose i store the history number of a command say :
1004 cat file
Then now i want to run it like : !1004 but by using a variable.
command=1004
!$command
i am getting errors like :
command=1004command
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Feb 17, 2011
how to assign a local variable value to a global variable....
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Apr 16, 2011
I am supposed to create an environment variable with the PRINTER variable, which should resolve to the word sales. Would the command be like this?: env PRINTER - NAME=SALES (is this the command to create that variable with resolving the word sales to it?)
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Jul 25, 2010
can i use the value of one variable to generate a name for another variable? for example i want to use the counter from a "do while" loop to name and define a variable each time the loop executes. for example
objectnames1=`ls -a`
objectnames2=`ls -a`
etc.
i don't have a script yet but each time through the loop i intend to cd to a particular directory and then define a variable containing a list of each object in that directory as values. for the rest of the script to work, each variable generated has to be unique, and i can't think of a good way to accomplish this.
if using a value from one variable to name another isn't possible, can anyone think of a more elegant solution? i know limited syntax but i'm willing to read up...
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Dec 27, 2010
I am trying to alter the character position of residue numbers above 999 in a pdb file.The following script is an attempt to:1) Get all unique pdb residue numbers (in column 5) using awk and assign it to a variable i.2) Loop through all the values in $i and if it is greater than 999, shift that number one character to the right using sed.However, the script only manages to alter the final residue numberCould anyone please advise how I can loop through all values in $i and shift it one character to the right?
#!/bin/bash
# Script to alter position of residue number in pdb file for resid above 999
i=$(awk '{print $5}' wt-test.pdb | uniq)
[code]...
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Jun 13, 2011
I have to call URL from shell script. E.g.: www.google.com. How can I call URL from the shell script.
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May 13, 2011
Suddenly, i have problems when i call a script when i use some arguments/variables
Here is my code:
Code:
This is my output:
Code:
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Oct 13, 2010
I want to call a application file in user space through a character driver running in kernel space.
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Aug 17, 2010
how can you remove all the makefiles and whatnot and basically restore the source package to its original form after you've called "./configure" or even "make" ?
for instance you changed the source code then you ran ./configure then make then make install ....etc you checked the software and it functioned as you expected it does , now you want to remove all the makefiles and all that other jizz that you don't need or want anymore in the source (obviously in order to package it for distribution)
what is the "standard" method for doing so?
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Aug 18, 2009
I have 2 shell scripts, script1.sh and script2.sh. I call script2.sh from within script1.sh ( by simple ./script2.sh command). Based on some condition, i use exit 0 to exit out of script2.sh. I was trying to find if i can exit out of script1.sh as well at once. below is the example
script1.sh
#!/bin/bash
echo "Before ..."
[code]....
When i execute below is the output
Before ...
There was problem file is empty
The Script will Exit. Please fix the issue and run again...
After ...
I am trying to exit out of script1.sh as well so that i dont print "After ..."
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Oct 27, 2010
I read somewhere that you should not be reading config space to determine the irq value to pass as the first argument to request_irq(). What is the proper way to determine the value of the 'irq' argument before calling this function? Hope this is the correct forum. I don't see one for drivers.
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Jul 27, 2011
I am setting up a cron job, where i am calling a shell script to make few builds. I got struck at a point, need some expert inputs to proceed further. The script is categorized in 5 parts and in the last part while building software it asks for few questions like:-
1. Build mode choice
2. normal build
3. Copy Images
4. Arch
User manually has to input ans for these questions:-
1
yes
n
64
The ans's are fixed and this won't change. How shall i hard-code them or do something in the script so as when script flow reaches to this point it automatically take's these value. So far the cron job is not getting completed as it's waiting for user to key in these values manually. I had faced similar issue while building kernel modules but there it was easier as i had to take default values always:-
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Apr 27, 2011
Error while calling capget function (EINVAL)
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May 2, 2010
I am trying (desperately) to setup freeNX so that I can access my Mandriva box from my Macbook over my network. I have great need to be able to do this. Here's the necessary info for you: Mandriva PC: running Mandriva 2010.0 with freeNX installed from the Mandriva repos Macbook: running OS 10.4 with the Nomachine NX Client installed Now, I have followed the setup from the Mandriva wiki as well as the freenx wiki to no avail. I simply cannot connect the Macbook's NX client to the server. I get an authentication failed message. However, I can ssh from the Macbook to the server just fine (that's how I'm getting most of this work done).
[Code]...
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Jun 10, 2010
Back when I was first learning Linux, one of the questions that I kept wondering about was "what are all these files and directories for?" I couldn't find a resource that would explain them in a digestible manner. Specifically, I was looking for one that would allow me to look at a Linux filesystem interactively, collapsing and expanding folders to look at just the ones I was interested in at the moment. So later, when I got the opportunity, I wrote it.
But despite a ton of research, I'm still not totally knowledgeable on the subject. The most important thing I'm looking for right now is for experienced Linux/Unix people to tell me where I got stuff wrong, and for newbies to tell me how useful it is to them and which things need clarification. I'm also interested in technical and graphical ways to improve usability, like better icons, layout, etc. I know I need to be able to collapse long descriptions, but what would you like to see? The Works Cited list and a full introduction are still on the way as of this writing.
Without further ado: Linux Filesystem Hierarchy Explanation. You'll need a fairly recent browser that can handle XSLT; the actual info is stored as XML, and transformed into HTML with an XSLT stylesheet. This is still a work in progress, and I'll be updating it as the thread progresses.
Finally, would people be interested in collaborating with me on this, as an open-source project? I've never done anything like that, and I'm not sure how much time I'll be able to give it in the future, but I really think this should be continued and expanded.
Edit: Works Cited and decent intro are now in place.
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Jul 18, 2010
hi..
I'm using ubuntu 10.04 and whenever i start nautilus from command line it shows error:
Code:
root@aduait-laptop:~/Desktop# nautilus
Initializing nautilus-gdu extension
** (nautilus:9990): WARNING **: Error calling get_folders: Launch helper exited with unknown return code 1
** (nautilus:9990): WARNING **: Error calling get_folders: Launch helper exited with unknown return code 1
** (nautilus:9990): WARNING **: Error calling get_folders: Launch helper exited with unknown return code 1
** (nautilus:9990): WARNING **: Error calling get_folders: Launch helper exited with unknown return code 1
** (nautilus:9990): WARNING **: Error calling get_folders: Launch helper exited with unknown return code 1
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Aug 21, 2009
I'm trying to read content of file to variable and use this variable in for loop. The problem is, when I have c++ comment style in file - /*. Spaces in line are also interpreted as separated lines.
For example:
Code:
Changing $files to "$files" eliminate these problems but causes that whole content of variable is treated as one string (one execution of loop).
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Apr 7, 2010
my script has a variable which comes in the form +00.00 +0.00 -00.00 or -0.00 (the numbers can be any in that form) for any that have a + symbol I need to remove the +, but if it has a - symbol it needs to stay.
i need to make a new variable with the string from the old variable btut without any plus sign. I have tried a lot of different ways with no success, each thing I tried either left the + or removed the entire string. I think this should work but doesn't
foo=+12.40
bar=${foo#+}
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Jul 7, 2009
I want to give root privilege to the command rm for only a directory Dir inside /local/home. How I can do that?
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Jan 27, 2010
Is there any way by which one can give ownership while creating directories itself. It should be one command otherwise it requires root login to change ownership of a directory.
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Aug 4, 2011
[code]...
why is this? make menuconfig giving error
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Jul 13, 2011
and executing my package on red hat version 2.6.18-164.el5 and displaying no error but my binary is not created what could be problem ??
make[1]: Leaving directory `/root/kartik/POC_SSI_1/iub_dogw/ipr/common/cspl'
gcc -print-file-name=libgcc.a -g -Wall -Werror -D_GNU_SOURCE -r -o /root/kartik/POC_SSI_1/iub_dogw/bcpapp/../bin/x86_64-redhat-linux/bcpapp/bcpapp -lgcc -lc /root/kartik/POC_SSI_1
[code]...
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Apr 15, 2010
The following code is giving segmentation fault.
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Jun 10, 2009
I have a text file i that has a mailTo: NAME in it. In a bash script i need to extract NAME and put it in a $variable to use. How do i do this?
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Apr 25, 2011
how I can search within a variable and assign the results to a new variable. I'll use the following as an example -
cars="Audi BMW Cadillac Chevy Dodge Ferrari Ford Mercedes"
list=`echo ${cars} | egrep -o '<A?+|<C+'`
with the echo command I get the following output assigned to list -
A
C
C
What I'd like to get for output is -
Audi
Cadillac
Chevy
how I could do this regardless of upper/lower case letters?
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Jul 30, 2011
I will be setting up a computer for people who have very little experience using computers and I want to limit their ability to break things. I'm thinking Linux is the way to go but I don't know what distribution to use. I don't know anything about their hardware other than it is an old laptop. I don't have a lot of experience with Linux, but I would think that without sudo there is not a lot of things you can break.
What would be a good Linux dist that has everything out of the box? (flash, vnc, office, etc) How should I set up the user account to avoid giving them too much power, yet still allowing the computer to be useable for daily tasks? (Will they be able to update software?) I also want to be able to control the machine remotely since I won't have physical access after I set it up, so I am looking into ssh, vnc, (or a better alternative?).
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