To create simple text tables to paste in emails or to use in any other document where you want to show a table, here is something that you can use. There is a perl module which provides “tablify“. And here is how to use it:
sudo yum install perl-Text-RecordParser
This will install a command “tablify” that you can use in number of ways. Here is a simple example to use it. You can read the man pages to see how you can use it.
Continue readingLots of times you want to convert tabs to spaces and sometimes from a shell script, if that is the case, then simple solution is “tidy“. First you need to install tidy as follows:
sudo yum install tidy
and then you can use the command tab2space.
tab2spcae
This will print the output to STDOUT by default which you can redirect if you want.
Continue readingIn Fedora, ramdisks are not created by default as is the case with RHEL. So, if you need to get Ramdisks on Fedora, then you can do this:
sudo yum install MAKEDEV
This will create some default Ramdisk’s in the “/dev” directory. Now, if you need to change anything then feel free to go to “/etc/makedev.d” and feel free to change these files.
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If you have to compare cksum for couple of files, the you know how cumbersome it is. So, I wrote a simple script, wherein you can create a file called cksums in the current directory and copy paste the result of “**cksums ***” into this file, and then run this script. Cool 🙂
#!/bin/bash -
#===============================================================================
#
# FILE: checkcksums.sh
#
# USAGE: ./checkcksums.sh
#
# DESCRIPTION: Compare cksums of multiple files.
#
# OPTIONS: ---
# REQUIREMENTS: ---
# BUGS: ---
# NOTES: ---
# AUTHOR: Amit Agarwal (),
# ORGANIZATION:
# CREATED: 02/22/2013 09:12:17 PM IST
# REVISION: ---
#===============================================================================
file=cksums
while read line
do
a=( $(echo $line) )
if [[ -f ${a[2]} ]]
then
b=( $(cksum ${a[2]}) )
if [[ $a == $b ]]
then
echo "Cksum for ${a[2]} = ${a[0]} matches"
else
echo "Failed ::Cksum for ${a[2]} = ${a[0]} matches"
fi
else
echo "Failed :: file ${a[2]} does not exist"
fi
done < $file
It is good practice to keep iptables/firewall enabled. But configuring it is difficult, do you agree. Not any more 🙂
Install firewall-config
sudo yum install firewall-config
This will install a GUI application, which you can run with “Firewall” application in the dash or with “firewall-config” in terminal. It is pretty straight forward to use this tool, even if you don’t have much knowledge on Firewall/iptables.
Continue readingIf you want to use sendmail so that you can send all your mails from the local system to your email address, then you have to use sendmail. Now, configuring sendmail has never been that easy and if you are working internally on your corporate network then for sending mails to the same domain, generally you don’t have to login. That being the case, you can use something simpler like “sstmp“. Install ssmtp with:
Continue readingss is :
ss is used to dump socket statistics. It allows showing information similar to netstat. It can display more TCP and state informationsthan other tools.
This comes in iproute package in Fedora. So, to install this you would need to install “iproute” if not installed already.
sudo yum install iproute
Now, once you have done that you can look at the man page to check what all you can see with ss. but here are some examples:
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