Linux is a Free (libre), Open Source, Unix-like operating system.
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0answers
19 views
Local branch update script using Git and PHP
I'm using Git and PHP to create an update script which is sync local branch and the master. It checks about new updates, and if yes, it proceeds to the Git pull request and any response got from the ...
0
votes
0answers
8 views
IPtables for a secure nginx webserver
Based on my reading online and a few tutorials I have produced a set of iptables rules:
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-4
votes
1answer
32 views
Reading temperatures from /sys
I have this code which is working fine but I would like to use Java 8 NIO in order to optimize the code performance.
...
3
votes
1answer
40 views
gcc installation script for Centos6.6
I have written this script to install gcc (here in version 4.9.2) on Centos6.6. I am only interested in C and C++ support.
Please comment if this is any good and can I make it better before I get the ...
2
votes
0answers
75 views
Multipurpose command-line utility to manage a web application
I'm creating a command-line tool which is supposed to work on both Windows and Linux OS. It will be used to manage our application - start, stop, deploy etc.
We have it in bash scripts now (and it ...
5
votes
1answer
26 views
Simple file locking wrapper command in C
A simple command that wraps another command, locking a file first. It is similar to flock, just simpler.
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4
votes
2answers
166 views
Bash script to send emails when web server does not respond
I've made a simple bash script to check if a web server responds, and to send emails to a list of addresses if the website is down. Any suggestions as to how to improve it/ edge cases that I missed/ ...
3
votes
1answer
101 views
6
votes
1answer
61 views
Fast Thread- and multiprocess-safe file operations in python under Linux
I'm trying to implement an alternative to python built-in open(), but safe for use in multi-threaded and multiprocessing environment. I'm using advisory locking, ...
3
votes
1answer
33 views
Simplifying a Makefile
I have a makefile like the one below and I am trying to simplify it. I know I should be assigning variables to cut down on repeated things but I am still confused as to how to properly simplify this ...
4
votes
2answers
49 views
1
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2answers
29 views
Repeatedly fetching a URL until the response contains “state: INIT”
I am working on a project in which I need to make a URL call to one of my servers from a bash shell script.
http://hostname.domain.com:8080/beat
After hitting the above URL, I will be getting ...
5
votes
3answers
56 views
Check disk space against a threshold
The below script is one I made to check the disk space on mounted partitions under Debian Wheezy. I tried adding a -d switch to force printing out the used data, ...
3
votes
2answers
55 views
Number of files with specific file size ranges
I am trying to write a script that will traverse through my directory and sub directory and list the number of files in a specific size.
For example, 0kb-1kb: 3, 1kb-4kb:4, 4-16KB: 4, 16kb-64-kb:11. ...
10
votes
3answers
132 views
Making kexec reboots less painful
kexec is a way for a Linux kernel to directly boot another Linux kernel without going through the usual BIOS startup sequence, which can take several minutes on enterprise servers. The big problem ...
0
votes
1answer
122 views
Is this iptables firewall bash script good? [closed]
I'm learning to use iptables to implement it in my company software. The goal is either to prevent the major attacks and to have good speed transferring files (ssh and ftp). Can you help me to improve ...
12
votes
1answer
122 views
Calculating the harmonic average
In this program I was required to calculate the Harmonic Average using an assembly program with a C driver.
Harmonic mean is define as:
$$ \frac{n}{\dfrac{1}{x_1} + \dfrac{1}{x_2} + \cdots + ...
1
vote
1answer
47 views
Screen timeout/lock script
This is a script I made while having trouble with xautolock and dimming of the screen right before locking it. I would like some tips for making it a bit more robust and to know of any disadvantages ...
2
votes
1answer
131 views
Dovecot user add & delete bash script
I learn BASH scripting occasionally from time to time, now I am working on a simple bash script that serves to maintain dove-cot user database. The general purpose of the script is able to list, add ...
3
votes
3answers
62 views
Copy a directory from source to destination
I wrote a program that copies a directory from a source to a destination, similar to the cp utility.
For this, I used the essential functions:
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1
vote
0answers
93 views
Speeding up forwarding of Ethernet frames in Python ARP spoof
I've followed a few tutorials on ARP Spoofing with Python/scapy. They all suggest activating the OS IP Forwarding in Linux:
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1
vote
3answers
1k views
Calculate CPU% by process from /proc/stat and /proc/<pid>/stat
We don't have the possibility to install modules like psutil on some boxes, thus I decided to write a simple script to calculate the CPU percentage by the given ...
3
votes
2answers
256 views
Checking percentage of free memory using top and awk
The following Awk code was created in order to verify if free memory from the top command is less than 20% of the total.
I've noticed that I actually do not need the ...
3
votes
1answer
89 views
Parsing arguments for cd command
This file manager has a code snippet that handles an argument of the "cd" console command. It converts the argument to a valid path, expands ~ and environment variables into the corresponding values:
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6
votes
5answers
236 views
Mounting multiple partitions on a disk
Is it possible to improve the code of this bash script? ... or should I just use another language? (If so, which one would fit the best the situation, according to you?)
Here is the code (simplified, ...
3
votes
2answers
319 views
Editing /etc/network/interfaces
I am trying to change static to dhcp in the /etc/network/interfaces file and vice versa ...
6
votes
1answer
1k views
Using /proc/stat to calculate CPU usage
Inspired by this question: To calculate the total CPU usage as a percentage
I wrote the following bash script (as an answer) to calculate the CPU usage for a (configurable) period over all CPU cores ...
12
votes
2answers
981 views
To calculate the total CPU usage as a percentage
I have been developing the below method to calculate the CPU usage of a Linux system at a point in time, as a percentage of the total number of cores available in the system.
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10
votes
2answers
329 views
Minimalistic rmdir
In my eyes most of the GNU stuff is bloated and doesn't really fit my view of how a Linux environment should look like. I have come up with my own minimalist implementation of the GNU Coreutils, but ...
4
votes
1answer
37 views
Script to fix audio level
I need to fix and maintain the master volume in PulseAudio (so that I don't blow up my speakers). E.g. call gfaaudio -v 25 to fix volume at 25%. Is there a cleaner ...
10
votes
2answers
295 views
Parsing of a (Linux) netlink hotplug uevent packet
The netlink service is used, among other things, to notify userspace about hotplug events (e.g. "a device has been connected"). These events come in the form of packets, which follow the following ...
3
votes
2answers
126 views
Group and send all files to filetype folder
I have around ~2M of files in one folder, which I need to manage. So, I want to separate them in groups by their filetypes.
Example:
filenames
...
10
votes
3answers
761 views
3
votes
1answer
149 views
Perl script to check disk usage
I'm looking for input on the code itself and formatting/style. This script parses the output of df -h on a Linux server and emails the user if the usage percentage ...
2
votes
0answers
80 views
Linux-based WiFi AP daemon [closed]
I've written this small Linux-based daemon to create a WiFi AP that should work across various distros like Ubuntu, Fedora, etc.
I'm not a great expert in Python, nor do I know that the various ...
4
votes
1answer
48 views
Generic Makefile
I decided to setup a generic makefile to compile SFML programs, as I'm going to be making a bunch of small apps over the next few weeks playing around with it. I'm still new to writing makefiles ...
5
votes
2answers
2k views
Small bash script to start and stop named services
I've been working on ubuntu since many years but not quite familiar with bash scripting. My development tools involve servers like nginx and apache, the mysql database and beanstalkd. Obviously, I ...
5
votes
2answers
363 views
Benchmarking our LAMP servers with this php script
I've written a small script to benchmark our LAMP hosted servers that assess the performance based on three factors:
Disk I/O
Database I/O (mysql)
Database I/O (sqlite)
The logic is as follows:
...
2
votes
1answer
82 views
Optimizing string replacement program that uses recursion
I have the following string replacement program for a string of size 256:
I am replacing the string
"\'"
with the string
'
Please suggest any modifications if needed or any ...
3
votes
1answer
689 views
Converting from std::wstring to std::string in Linux
I was bothered by inability of C++ to mix cout and wcout in the same program - so I've found this question:
Converting between ...
2
votes
1answer
35 views
IPtables for webserver with ssh
I've had a bit of help but I'm still a bit unsure. I have an nginx webserver with SSH only required. I wrote this rule set based on information I found on the internet:
...
4
votes
1answer
145 views
Is there a better way to copy into two different folders on a machine simultaneously?
I am trying to copy files from machineB and machineC into machineA as I am running my below ...
6
votes
1answer
120 views
Copying files as fast as possible
I am running my shell script on machineA which copies the files from machineB and machineC ...
3
votes
1answer
310 views
Script for obtaining images from an IP security camera
I am fairly new to Python and programming in general so I hope the code in this post is not too messy. I have the following code which I use for taking images from an IP security camera:
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11
votes
1answer
193 views
Set of wrapper functions for POSIX signal APIs on Linux
Please feel free to comment on the accuracy/validity of the following wrapper source for processing signals using the new POSIX sigaction API. If you feel I'm doing anything wrong or potentially ...
3
votes
1answer
160 views
Finding world-writable files in local directories only
Over at Stack Overflow I asked how to scan a local filesystem ignoring all remote mount points. I only really wanted a push in the right direction and received it. After clacking away on my keyboard I ...
4
votes
2answers
93 views
Packaging a single-file Python copy-tool
I'm currently working on a very simple one-file project:
Lumix provides the possibility for the camera TZ41 (and others) to load GPS data and tourist information from a DVD to a SD-card so that you ...
3
votes
1answer
145 views
Ping Pong Pi - A ping pong score and serving manager
I have spent a few hours on this code, but think it could be improved a bit. It requires eSpeak to be installed to run the speech synthesis, but the voice can be toggled on or off using the ...
12
votes
1answer
758 views
Linux NASM assembly linked list implementation
Inspired by all of the lovely linked lists lately, I decided to implement one in assembly language. This code maintains two linked lists - one is a free store and the other is the active linked list. ...
5
votes
2answers
127 views
VLC media player watchdog daemon v6
This question is a follow-up to a previous version of this program, which I wrote because I found it annoying that VLC Media Player (which I love) prevents the screensaver from starting after playback ...
