I have been trying to understand the color codes for bash for a pretty long time, but somehow never got time to understand this clearly. So this time around when I was writing a script to analyze some logs. I thought I will give it a go and finally understood some part of this.
So, first we will start with this script. This is taken from here.
Continue readingOnce the systemd unit and service files have come into being, understanding of the system services have changed a little bit and it might require some time to understand the cli tools for managing these services and units. That being the case, systemadm comes to rescue. This is a simple tool which :
Graphical front-end for systemd.
For installation :
sudo yum install systemd-gtk
And here’s a screenshot::
Continue readingIf you want to use snoop or tcpdump with advanced search in the packet, then you would need to convert the string to hex string. For this, either you can use a web search and find some web application to do that or you can use a simple C program like this 🙂
/*
* =====================================================================================
*
* Filename: ascii.c
*
* Description: ascii to dec
*
* Version: 1.0
* Ceated: 03/02/2012 12:08:49 PM
* Revision: none
* Compiler: gcc
*
* Author: Amit Agarwal (aka), amit.agarwal@roamware.com
* Last modified: Thu Mar 08, 2012 08:47PM
*
* =====================================================================================
*/
void main (int argc, char **argv){
int i=0;
char a[200]="",b[200]="";
printf("String - %s, Length - %d\n",argv[1],strlen(argv[1]));
/*printf("%x\n 0x",argv[1]);*/
while (i < strlen(argv[1])){
/*printf("%c",argv[1][i]);*/
sprintf(a,"%s%x",a,argv[1][i]);
/*printf("a=%s\n",a);
printf("b=%s\n",b);*/
sprintf(b,"%s%d",b,argv[1][i]);
i++;
}
printf ("\n");
printf ("String : %s\n",argv[1]);
printf ("Hex : 0x%s\n", a);
printf ("Dec : %s\n", b);
}
There are times when you would want to have a local search engine capable of indexing even pdf and doc files. So here is a solution.
You can use “Omega” and here are the instructions.
download omega from http:// xapian.org/download
yum install xapian libuuid-devel
And then make and install omega and for this you can follow the instructions.
Create index using command omindex
and then you can use quest or search.py to search or you can setup the cgi way so that you can use local browser to search.
Uptimed is an up time record daemon keeping track of the highest
up times the system ever had.Uptimed has the ability to inform you of records and milestones
though syslog and e-mail, and comes with a console front end to
parse the records, which can also easily be used to show your
records on your Web page
sudo yum install uptimed
Once installed, you will have to first create the boot id with this command:
Continue readingHere is a short description of pigz:
pigz, which stands for parallel implementation of gzip,
is a fully functional replacement for gzip that exploits
multiple processors and multiple cores to the hilt when compressing data.
And for the installation:
sudo yum install pigz
With pigz, if you don’t have many things running on your multi processor machine then you will see a significant improvement when you are gzipping the files.
Continue reading
LibreOffice 3.5 was released few days back with loads of features and improvements. Most bragged about feature should be capability to read visio diagrams. You can read the full list of features here. And here are some interesting features: