Programming :: Simple If's In Bash Scripts?
Nov 7, 2010I have been looking at: ut a lot of it is to do with files and numerical comparisonswhat would be the bash equivalent of:if (http isin $2) { do something }
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Programming :: Simple Subtraction Using Bash And Bc
Nov 4, 2009I am trying to create a function that takes a pair of a high and a low limit, and returns an arbitrary number between them. Below is my attempt to create a function that accomplishes this by checking to see if they are equal, and if not, subtracts a very small number from the high limit and returns the result.
View 2 Replies View RelatedProgramming :: Simple Bash Script Is Not Running All Of The Commands?
Jun 14, 2010I am running a simple script that I copied from slug.ceca.utc.edu/docs/2009-3-26-linux-server-health.pdf and edited with the names and paths of my own servers. I don't know much about scripting (re: nothing) but I wanted to try and be efficient in my new role as a Linux Sys Admin. The script was saved to root's home directory and runs as part of root's crontab once a week. The script runs with no problem, but it doesn't actually seem to run all of the commands contained within. It skips some in the middle and the end and I don't know why. The script itself is this:
Code:
#!/in/bash
uname -a > /tmp/server.txt
[code]...
Programming :: Simple Bash Script Not Returning Correct Value?
Sep 14, 2010I have a very simple bash script:echo -n Create home directory?:
read HOMEDIR
if [ $homedir="y" ] || [ $homedir="yes" ]; then
homeval=" --makehomedir"
[code]...
Programming :: Simple Bash To Write Files By Year To A Log File
Jan 31, 2011I 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?
Programming :: How To Compile / Simple Tutorial For Making Simple Program
Oct 7, 2010i'm a college student studying pc programing, and i was given today a special work and i have to program using miranda... which i've never used it >.< can anyone give me a hand to where to download, how to compile, and a simple tutorial for making a simple program or something?
View 3 Replies View RelatedUbuntu :: Calculate An Average In A Simple Way With Bash?
Mar 3, 2010does anyone know how to calculate an average in a simple way with bash? I've got something like this:
Code:
$ cat results.txt | head -10 | tr " " " " | cut -f13
0.23929285124
0.404716908011
0.35113102608
[Code]....
and now I want to calculate the average of the resulting numbers. I know I could write a bash or awk or perl script and use that, but isn't there a more simple, elegant way? There is for example "sum" in the coreutils, but no "avg"..
Ubuntu :: Use The Date Command In A Simple Bash Script?
Oct 26, 2010I 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?
General :: Simple Bash Command Causing Bad Variable Name
Feb 18, 2010When 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.
General :: Create A Simple GUI For The Bash Script Files?
Feb 20, 2010Are 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.
View 4 Replies View RelatedGeneral :: SSD Trim Simple Bash Script Program?
Jul 9, 2011I 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].....
General :: Unable To Execute Simple Bash Scripts ?
Dec 24, 2010All of a sudden,i can't execute a simple script as follows:
exit 0
and:
exit
General :: Make Simple Website In System Using Bash Scripting?
Apr 3, 2011How to made a simple website in linux using bash scripting.
View 3 Replies View RelatedProgramming :: C++ Programming With Simple RTAI Functions Outputing Words?
Apr 11, 2011I need help as I am not proficient with Linux C++ Programming. There are two parts which I need to do in the coding provided below.
1. Produce the program so it can output the word "Hey there!" and wait two minute and print the word "See you later!".
2. Produce the program that will output the text "Cool" every 20 seconds by setting a periodic task.
Quote:
#include <linux/kernel.h>
#include <linux/module.h>
MODULE_LICENSE("GPL");
int init_module(void)
{
printk("Hey there!
[Code]...
Programming :: Build A Simple Program For C Programming Class?
Feb 12, 2011im trying to build a simple program for my C programming class, this is the source code
#include <stdio.h>
int main()
{
int length, width, length, height, area, perimeter;
perimeter = width + length + height;
area = width * length + heigth;
[Code]...
i dont see any error (you might)but every time i run it it runs but after it asks me to input for the width i do it but it doesn't take me to the length, it just stays blank until i input another value in the same place for the width, it asks me for 4 inputs in total i don;t know why, and after i run it different times it gives me different values for the perimeter and are. how can I fix this?
General :: Bash Variable - Simple Script For Finding And Copying Files Powered By The Command?
Aug 2, 2009Ive 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?
Programming :: Bash: Printing The Line Number In Bash Script?
Feb 4, 2011I would like to know how do I print the line # in a script. My requirement is, I have a script which is about ~5000 lines long. If there are any errors happen I just exit. And I would like to add the line # of the script where the error happened.
View 3 Replies View RelatedProgramming :: Bash Ctrl+c Tarp And Bash Read With Timeout?
Jan 24, 2010simple bash code:
Code:
#!/bin/bash
trap "echo 'you got me'" SIGINT SIGTERM # to trap ctrl+c
echo "Press ctrl+c during 5 sec loop"
for ((i=0;i<5;i++)); do
[Code]...
How come code behaves normally and stops when ctrl+c signal is caught and resumes, but after I use at least one timeout read in the code it looks like, if signal is caught again it doesn't pause the execution but skips the loop. If you remove -t (timeout) option from the read, both loops look the same!
Programming :: Reading A Bash Variable In Bash Scripting ?
Nov 26, 2008I have a config file that contains:
my.config:
Code:
Now in my bash script, I want to get the output /home/user instead of $HOME once read. So far, I have managed to get the $HOME variable but I can't get it to echo the variable. All I get is the output $HOME.
Here is my parse_cmd script:
Code:
Programming :: Run Multiple Bash And Php Scripts From A Bash Script?
Jul 25, 2011I have written quite a few separate bash & scripts and php scripts that up to now I have run from cron jobs. However I have to estimate how long each takes to run, before running the next and so it probably takes much longer than necessary to run them all. They have to run in order.
Now there are so many I am thinking it would be better to have a master bash script that would run one after the other, but I am not sure how to get the master script to wait before starting to run the next script. Is this possible and is there a command that will make the script wait between bash and php scripts , for them to finish, before running the next?
Programming :: Create A Simple Makefile Using C ?
Mar 26, 2011How to create a simple Makefile using C....
View 3 Replies View RelatedProgramming :: Getting Perl Simple Recursive Sub?
Feb 16, 2011This is my sub;
Code:
sub projName
{
print "Enter project name: " ;
$PROJ = <STDIN>;
print "";
[code]....
I can call this routine and it works fine when I enter a valid name for $PROJ. If I enter an invalid name it goes to the else block and prints the statement. However, it does not call itself. Instead the script just exits.I've googled 'perl recursive subroutines' and the example don't appear to be doing anything different.
Programming :: Bash: Get Filename And Extension Using Bash?
Jan 9, 2010I would like to get the filename (without extension) and the extension separately. The best solution I found so far is:
Let FILE="thefilenameofsomefilesfor_instance.txt"
Code:
NAME=`echo "$FILE" | cut -d'.' -f1`
EXTENSION=`echo "$FILE" | cut -d'.' -f2`
I think it would be better to count the len and remove 3 chars to right to get the extension, but it can be macintosh filenames with have 4 chars for extensions.
Programming :: Get Started With Making 'a SIMPLE Dock'?
Mar 22, 2011This is probably hopelessly ambitious as I'm not a C or C++ programmer (I normally like to stick to scripting languages like BASH or Perl). Basically I'm looking on good advice to get me started with writing a Application Dock with the functionality of the OSX dock but without the overly flamboyant graphics that have characterised the Linux versions.At the moment the closest I've found to what I would like is bbdock. However it falls well short of the functionality of what I would like.
What bbdock does is read a file to create an icon for the openbox dock/fluxbox slit/wmaker whatever that launches an application when first clicked, shows an little arrow when the application is running, and brings the application to the fore when clicked once running.Here's a screenshot of it doing just that.The drawback to bbdock is that it doesn't really look for running applications, only those launched from bbdock. So for example it wont notice if I've launched an instance of pcmanfm from the openbox menu. And therefore it obviously also doesn't add icons for other applications that are running.
What I would like to be able to do is detect new running applications and add a bbdock icon for them. Also to detect if an application already with a shortcut has been run and update it's status to show it's open. Probably have an up and down arrow to move the icons up and down when there are too many to fit on the screen. None of the above needs fancy animation. The fade to gray effect used by bbdock is quite nice and could probably be augmented with a fade in and out to grey to represent another action, say fading to grey and back when launching and greyed when iconified.So, my question is what do I need to get started doing this? Am I best using the pretty outdated bbdock wmaker dockapp style? What functions and libraries am I likely to need to achieve the effects I want? Are there any examples of how to monitor running applications (well windows and figure out what constitutes a new application) that I could look at for inspiration. Is there anyone who's into C++ for linux who would be interested in helping me out to get this small project working?
Programming :: Simple Script For Comparing Two Directories?
Apr 1, 2011have a simple script for comparing two directories. I want to list all differences between this directories.
here is my function for compare:
function comp
{
for i in $1/*; do
if [ ! -e "$2/${i##*/}" ]; then
echo $i
[Code]....
in my script these two files are equal(my script ignored last time modified)
Programming :: Creating Simple Webcam Effects?
Apr 13, 2010I want to create simple webcam effects filters. I am only interested in doing relatively simple image processing like blurring or averaging the color. I would like to create the filters in either C or Python.
So before I dive into using Gstreamer or V4L I wanted to ask the forum if they have had any experience with webcam development?
Programming :: Python: Simple Message Queues / IPC?
Mar 10, 2010I have this daemon I'm writing in Python, but I still a Python n00b. I've coded the part of the daemon that does the work, but not the part that receives messages. I need a simple system so that other processes on the same (Linux) computer can occasionally send text-string messages to the daemon (without needing to stay running all the time themselves). Once in the past we did something similar by (mis)using pyliblo to listen for OSC messages coming in on a certain port. That option isn't as workable here because the pyliblo interface (as near as I can tell) requires you to know in advance specifically what messages you are expecting, and forward them to specified functions, rather than just allowing you to generically process incoming messages as you see fit.
View 1 Replies View RelatedProgramming :: Reading A Simple File Format In C?
Dec 16, 2010I made a string key-value mapping struct in C, and functions to add and remove entries. I would also like to write a function to read in this file format:
Code:
key: value
another: another value
[code]...
Programming :: Simple C# Using Mono Not Working Properly?
May 13, 2010I am creating a simple program using C# to print the contents of the todo.txt file once it has run. Problem is when I run the program, I get this warning.
PHP Code:
[code]....
Programming :: Simple Header For Perl Programs?
Nov 5, 2010i am trying to do something very simple like a header and a footer for my first perl programs, what iam trying to do is that when i create a file in vim: lets say hello.pl , i would like that file to have already this in its header:
#!/usr/bin/perl
and this on the footer:
print "
";
so that i dont have to type everytime #!/usr etc i tried to do it this way but i get weird vim errors: header is a file that contains the header and footer $ vim hello.pl;header > is there another way to do it as a function in bash or some other one liner command?