General :: Bash Variable - Simple Script For Finding And Copying Files Powered By The Command?
Aug 2, 2009
Ive been using linux for a while but I am just getting into shell scripting, im currently trying to get a simple script for finding and copying files powered by the command:
Code:
This works fine from the command line but when put in a script such as:
Code:
Code:
with the keyboard inputs for $fc1 and $fc2 being *.doc and ~/test respectivly. The only problem i can see is the xargs -ivar "var" part possibly needing $var to be defined?
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Feb 18, 2010
When I run this command from shell, it runs ok
export REVS=`svn info svn+ssh://svn.myone.ca/var/svn/story/trunk/lib |grep 'Last Changed Rev:'| awk -F: '{print $2}'`
However when I save it into a file called test.sh (of course, I chmod it with +x), I got error "export: 2: bad variable name"
Here is the file:
#!/bin/bash
export REVS=`svn info svn+ssh://svn.myone.ca/var/svn/story/trunk/lib |grep 'Last Changed Rev:'| awk -F: '{print $2}'`
I am using ubuntu.
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Feb 20, 2010
Are there any tools that can be used to create a simple GUI for the bash script files i have created, and the GUI should be able to run on both Solaris and Red Hat systems.
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Feb 9, 2011
I do this:
Code:
a@b:~$ export A=hi
a@b:~$ echo $A
hi
a@b:~$ bash -c "export A=blah; echo $A"
hi
a@b:~$
Why doesn't the bash command print the new value of $A? Is there a way to make it do so?
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Mar 16, 2011
iam trying to send sms using gnokii utility in linux firstly i did sudo apt-get install gnokii after that i got a gnokiirc.gz file in /usr/share/doc/gnokii/sample/gnokiirc.gz file here after that i did gunzip gnokiirc.gz then i transferred my file from the /usr/share/doc/gnokii/sample to home directory by using copy command as copying files to home is not allowed so i used sudo sudo cp gnokii /home after that i changed the port=/dev/ttyUSB2 and model=AT in the gnokiirc file in the home directory and then i wrote gnokii --identify
[Code]....
i followed as in the [URL] and [URL] and except this "Note that you will need read/write permissions on whatever serial port you specify in .gnokiirc."(iam confused what is my serial port is it ttyUSB2)
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Oct 26, 2010
I am trying to use the date command in a simple bash script as below:
#!/bin/sh
this_date=`date`
echo "The date is $this_date"
This script seems to work only if a surround the command with the `` characters, which I copied from another script. Can anyone tell me why this is, and how I can insert these characters from my keyboard,which only has normal quote and double-quote characters?
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Dec 8, 2009
On one of my servers I see this when I log in. What does this mean and how can I get it to go away? Everything seems to work fine, but none of my other machines give this error.
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Nov 15, 2010
I've got two external hard drives, a 2TB and a 320GB. I've recently come from Windows 7. On Windows 7 I wrote a batch file which checked whether both hard drives existed and then copied a couple of folders from the 2TB to the 320GB without overwriting. I've been trying to work out how to do the same under Linux without much luck. I've tried rsync but it looks like it overwrites. Does rsync overwrite?
If it helps, the batch file I wrote in Windows
if exist D:320GBDrive (if exist H:2TBDrive (xcopy H:2TBDrive* D:320GBDrive /I/E /-Y < C:decline_copy.txt))
Which basically checks for drive D:, checks for drive H: and then copies the contents of the folder on drive H to drive D and says no every time it asks to overwrite.
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Mar 1, 2011
I am having all sorts of trouble trying to assign a variable within an awk script with the system command. I know there is a lot of ways around this problem, but for efficiency reasons, I would like to, within my awk script, do something like
system(x=3)
or
system(x=NR)
and, latter on the shell script which calls the awk script, use the variable $x. But nothing is passed to x. I have already tried things like
command = "x=3"
system(command)
and also used a pipeline within the system to pipe it to /bin/sh In fact tried a lot of stuff like that, using $(( )) etc etc etc I can create directories e write to files (yes, i could write to a file and read from there, but I dont think it is efficient, plus I am puzzled).
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Jan 31, 2011
I have a folder of 2 many files that the old ls just hangs.
I am trying to write some log files such as;
I don't mind doing one at a time, but I am just playing and even getting the listing I am not getting the date stamp, I have the following;
That does create the file, but all the files look like this;
So basically it's just sticking that ls inside the log file and not actually running the ls, so how can I use the above type to get files just created per year?
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Feb 12, 2011
I'm trying to execute the following command within a bash script:
Code:
tac /var/log/system.log | head -1
The script I wrote is:
[code]...
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May 3, 2010
I would like to count all the jpgs in my home folder I need a command like this:
~$ Sudo count -R /*/*.jpg
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Jun 21, 2011
Linux command to find files changed in last n seconds. shell script,that we can run from cli or command.
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Dec 9, 2010
Is there a way to copy a file from the desktop to /usr/lib/ICAclient folder that I have, by using drag and drop.For some reason, I thought I was able to do this in Mint.
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Jul 8, 2011
I have to work in terminal but I don't know the command of copying files from one folder to another. e.g from /share/ParaDiS.v2.3.5.1 to /home/newfolder what should I type?
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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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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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Jul 9, 2011
I wrote this script which works but it should run automatically about once per week. I hunted and experimented with KDE Task Scheduler (no dice and no help anywhere) and cron (confusing instructions and cannot edit crontab -e with vim, and cannot enter cron folders/files). I would settle for a desktop shortcut to run the script but found no for that.
Script:
Code:
#!/bin/bash
xterm -hold -e fstrim -v /
Machine:
OS: openSUSE 11.4 x86_64
[code].....
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Dec 24, 2010
All of a sudden,i can't execute a simple script as follows:
exit 0
and:
exit
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Apr 6, 2009
I work under centos 5, I would like to know which command to use in order to find where the useradd command is geinstalled. Second How can I find the 10 last files sorted (reverse) from the /etc directory.
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Apr 3, 2011
How to made a simple website in linux using bash scripting.
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Mar 21, 2011
I've a script that it's invoked with n-variable parameters. Here's an examples:
Code:
./myprogram.sh inputdir FIELD1 FIELD2 ... FIELDN outputfile In the script I would like to get the FIELD names that were passed.
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Mar 21, 2011
Assume that i a having the following three lines in an executable file
#/bin/bash
a=Tue
Tue=1
When i give echo $a the value should be 1, how to do this.
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Aug 22, 2010
I'm basically setting up two sshfs mounts and I have it set up so I run one command but type my password twice.Is there an easy to way to input a password using bash and pass that variable to another process asking for a password?
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May 10, 2011
I want to create a variable that when passed as a parameter to another bash script will keep its string quotes (so it stays as one parameter). What ways can I achieve this cleanly?
Code:
john@ubuntu:/usr/local/src$ cat foo.sh
#!/bin/bash
echo $0
[code]....
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Apr 7, 2011
In my script, and I would like to concatenate 2 variables names, to give me the true variable.I've 3 variables X1, X2 and X3, and I invoked them inside a for loop.
Code:
#!/bin/bash
X1=HELLO
[code]....
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Mar 21, 2011
I know that cat can output the file, but how do you store that output in a variable to process:
Code:
CONTENT=cat file.txt
This doesn't seem to work?
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Jul 21, 2010
I want to be able to use Ctrl+R to have reverse-i search. Also if I press Shift+Up Arrow after typing the first few characters of a recently executed command then the shell should complete the command by finding the most recent commmand having the same first few characters.
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Mar 17, 2010
i am dealing with this problemI have a function
function Une {
...
return $some_variable
[code]...
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Apr 9, 2011
I have a hard time with my bash script.
It forget global variable's value.
First look at my script.
Code:
Echo "PKGS is [$PKGS] in after loop"
And data file for it is below. Let's name as list.txt
Code:
As you see, PKGS variable in loop has correct value.
However, after loop I can not get proper value for it.
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