Am not sure of the best way to go about writing a script. All I need at the moment is to start a java http server program at startup.How should I write languagetool.sh so as to be able to stop the script execution?
View 10 RepliesI'm trying to write a toy linux shell. For starters this is what I'm trying to do:
1. Start a new process with fork.
2. Execute a program in the new process with execl().
3. Redirect the output from the new process from STDOUT to another file descriptor, using dup2(2).
4. In the parent process, read the output from the child process and write it to the screen.
Creating a new process and executing a program in it is no problems, the problem is that I can't seem to capture the output from it in the parent process.
Code:
//digenv
//C++arl 2011-03-24
#include <stdio.h>
#include <sys/types.h>
[code]...
I wish to create my own shell for my operating systems project in college...
My professor has asked me to make sure that my shell can execute at least 30 or 40 commands... I have around a month's time
I have seen endless source codes in the net, I'm not able to understand any of it
How do i get about doing it?
I need a help regarding writing a function in a shell, what exactly a function does!!
View 3 Replies View RelatedHow do i write a shell script to ssh into a remote server with password and run a script in it?
View 2 Replies View Relatedwrite shell script for copy files to usbdąsk that cosist of very long argument like "2009025_efkl".
View 1 Replies View RelatedI don't know how to write a shell script to set security policies for Linux to start. and how. I know that there are many security policies for Linux but do not know which one best suited to write a shell script.
View 5 Replies View RelatedWrite some simple script?
Heres what Im trying to do:
-Qjackctl has a config file which is modified each time QjackCtl is shut down. This means that whatever preset is in use when QjackCtl closes is written into the QjackCtl config file as the DEFAULT PRESET, for the next time QjackCtl starts (or at least this is how I understand it).
-I want to edit a specific line in the QjackCtl.config file, which specifies the DEFAULT PRESET. Obviously its easy to do manually, but I want to do it using a shell script which runs automatically on StartUp so that QjackCtl starts every time with the same DEFAULT PRESET, NOT the last one used.
-Unfortunately Im not at my Linux system right now (which is KXStudio/Kubuntu), but I believe the QjackCtl.config line looks something like this: DEF_PRESET=alsa (where alsa is the name of the preset)
PRESET1=alsa
PRESET2=firewire
I want a shell script which changes the line DEF_PRESET=alsa to DEF_PRESET=alsa, even when it may currently exist as DEF_PRESET=firewire due to occasions when firewire was the active preset when Qjackctl was last closed. I notice that the application in KDE that enables the user to set which applications open automatically on StartUp also allows the user to select shell scripts.
Ive done some research, as a beginner, and Im led to believe I might need to use AWK and/or CHMOD. I could have a go at writing a shell script but Im always wary about experimenting with StartUp scripts/operations because obviously if I get it wrong and make my system unusable, then because its going to run first thing on each boot, Id have great difficulty disabling it.
If say, I want to read the input given by user at the command prompt and write a code to execute the cmd given then which commands do i use to implement this ( Im writing the code in C )?
View 8 Replies View RelatedI am a novice to the shell script. In my system from db server the log files are enerating with the name log1.txt,log2.txt..... It is capable of keeping 10 files at a time in dir called /db/sis/log1.txt. I want to copy the log1.txt to another directory when ever it generating by attaching the time stamp to it for the back-up purpose. this files will be there for a period of 24 hours. after that the back-up dir should be cleared and it start copying again the fresh file from the same dir.
View 3 Replies View RelatedI am trying to find / write a shell script that will go through a file organized like this (but with thousands of lines)...
93,5.00,"contig00002",169,83,"jgi|Brafl1|100379|fgenesh2_pg.scaffold_359000019"
579,1.00,"contig00003",3,380,"jgi|Brafl1|114745|estExt_fgenesh2_pm.C_1200006"
450,5.00,"contig00007",2,352,"jgi|Brafl1|274326|estExt_GenewiseH_1.C_8420008"
...and check the region of each line between the second and third pipes (the 6-digit numbers) against the values in the first column of a separate text file in CSV format like this...
274326,"Wnt family of developmental regulators"
114745,"FOG: Hormone receptors"
100379,"Transcription factor tinman/NKX2-3, contains HOX domain"
...and when they match, replace the value to the right of the third pipe (e.g., fgenesh2_pg.sca...) with the value in the second column in the CSV file associated with that number.
I want to write a shell script for submitting multiple jobs sequentially. For example,
#!/bin/bash
qsub job1.sh
# when job1.sh is done, run the next one
qsub job2.sh
how to make the shell script know that job1.sh is done and now I can run job2.sh?
I have a java program which I need to run as a service or daemon. What is the most stable method to do it? It will be heavy processing socket programming which will be continously receiving data?
View 4 Replies View RelatedI have installed version of ntop 4.0.3 by guide.But I can't start ntop daemon/service. I didn't find a service file for starting.During the installation there was no problem only want to RRDTool so I installed that. Now there is no necessary package required.
View 1 Replies View RelatedI'd like to create a couple of upstart scripts for some network service daemons (eg. usenet downloading service, torrent service, media management services, etc).Basically they should start after the network service is started and the system is running (runlevel 2?) but I'm just wondering if anybody has an example script or more specific start/stop conditions that I can use.
View 1 Replies View RelatedI want to write a shell script which will simultaneously collect OS user information and write in an individual text files.Can anyone tell me the syntax of the script.N.B. The user name will be mentioned in an array within the shell script.
View 8 Replies View RelatedIn a previous thread I had detailed an issue I was having with avahi not firing up properly at startup.As a bit of background: the services available on the server aren't advertising until I restart the avahi-daemon manually after startup - The syslog shows the daemon starting on boot, but it never seems to access the service file.I was wondering if it is possible that this may be a file permission problem?
View 1 Replies View RelatedI have created a script named ssh_inotify.sh to check /var/log/auth.log log file for newly started ssh session and display a question message box. This script uses inotifywait to monitor this above log file for modify file event and zenity to create question message boxes.Now i have created a startup service config file named ssh_inotify under /etc/init.d folder and placed the script ssh_inotify.sh under /usr/sbin and chmod this script to be executable.
The service config file ssh_inotify uses start-stop-daemon to run this script as background process.Now theproblem is that when i start this service using sudo service ssh_inotify start, the service is started, I can confirm this using ps -A | grep ssh_inotify also i can check for the PID associated with it under /var/run/ssh_inotify.pid. Now when i ssh to my machine, i do not get the question message box, I am writing in log file and in that i can see that the message under cancel button option for question message box is getting printed.This script runs perfectly when run directly or using start-stop-daemon command directly (exact command as typed in service config file above) on terminal, but not when this same command is executed using service file.Can someone please suggest me the solution and reason for such behavior when same command executed under different mode (using service or directly from terminal).If you guys require code, i can attach the files (currently i am in office so don't have access to these files.)
How to Write a small shell script that adds an extension ".new" to all the files in a directory.
View 2 Replies View RelatedI would like know when it is necessary or advisable to write a shell script instead of shell function ?
View 3 Replies View RelatedI have a script as report.sh which prints its out put in some file.Now I want to run this as a service so that when I start this service it shud run in the background and give me the out put.Again I should be able to stop it and I should able to configure its so that it can start when I start my system.What I have doneIn the /etc/servicesI have added report 5555/tcphen in the /etc/xinetd.d I have created a file report_com where I have given
service report
{
socket_type = stream
[code]...
I want to learn using SSH (Secure Shell) service in linux and connect to SSH server with PuTTY to test some commands, but I have not worked with it yet;
I have Ubuntu 9.04 on my "Virtual Machine" and my host OS is Win.XP and I have installed "OpenSSH server" and "PuTTY" from the ubuntu repository,
Is this action rational? I mean I want to connect from PuTTY on linux(on VM) to the SSH Server on linux?
(Meanwhile, I have no work with the host Windows and just wanna test it on the linux!)
where should I see the "Host Name/Ip Address" of the SSH Server to enter in the PuTTy's dialog? In windows we can use "ipconfig" command to see the IP Addresses, but I don't know what is the command in linx for this purpose?
use SSH Service in ubuntu correctly
how to write own shell in linux?i want to know procedure of shell programming.
View 5 Replies View RelatedI am trying to create a shell script similar to ls, but which only lists directories. I have the first half working (no argument version), but trying to make it accept an argument, I am failing. My logic is sound I think, but I'm missing something on the syntax.
Code:
if [ $# -eq 0 ] ; then
d=`pwd`
for i in * ; do
if test -d $d/$i ; then
echo "$i:"
code....
I am new and start learning how to write korn shell, can you someone please translate the below command to common English? code...
View 1 Replies View Relatedwrite a shell script that allows only user 1 and user 2 to execute a program and only from terminal 01 and terminal 02
View 4 Replies View RelatedIs there some type of functional way to read things in the Python shell interpreter similar to less or more in the bash (and other) command line shells?
Example:
Code:
>>> import subprocess
>>> help(subprocess)
...
[pages of stuff to read]
...
I'm hoping so as I hate scrolling and love how less works with simple keystrokes for page-up/page-down/searching etc.
I have a number of text files throughout my /home/pjs/Documents directory tree that have execute permissions set. Almost all of my file names have spaces in them. I am trying to write a shell script that will look at each file in my Documents directory, find the ones that have execute permissions set, and run the command chmod 644. Of course, I don't want the command run on the directories.
The following script *doesn't work*, but might serve to illustrate what I am trying to do:
#!/bin/bash
for x in "$(ls -R)" do
if [ -f "$x" ] && [ -x $x ]; then
chmod 644 "$x"
fi
done
I want each file and directory name to be placed, one by one, in the variable $x, and then tested with the "if" conditionals.
The first problem seems to be that, although the command "ls -R" does produce a complete list of the files and directories I need, they are not placed, one by one, in the variable x like I want them to be.
Also, I think I should use the shift command so that the option -R doesn't get included as one of the values of the variable $x, but I can't figure out where to put it.
I write a shell script below to add a job to cron.
#!/bin/sh
touch date.cron
echo '*/3 * * * * /usr/sbin/ntpdate 192.168.2.3' >date.cron
[code]....
I want to write a shell script contains python one. So,the result of python one is flv file. I want the path of this is copied into a enviroment variable that i have to pass as a flag argument of another program (to convert into mp3). To individuate the result of python script I thought to use (in PWD)
Code:
ls | grep -E '^.*mp3$'
But my question is: How can I copy this result into enviroment variable?