Show Local IP

2023-12-23 1 min read Linux Networking

Show local IP

You can see the local IP of the machine with the command - ip a. However if you have to use the address in some variable in a scrit. It becomes little tricky, something like

Show the interfaces in one line with ‘-o’
Show only IPv4 address’s with ‘-4’

and the command looks like

1

ip -4 -o a show dev eth0|awk '{gsub(/\/.*/,"",$4);print $4}'

Replace eth0 with then correct interface name.

Openvpn files to nmcli connection

2022-11-12 1 min read Linux Networking

Openvpn files to nmcli connection

Many times you get openvpn file and when you want to connect to the VPN server, you have to start the vpn client from the cli. How you wish that this was added to NetworkManager so that you could connect to it with one click. If this is the case, then you can use these commands to do the same ane enjoy :)

1
2


nmcli connection import type openvpn file test.ovpn
nmcli connection modify test vpn.secrets 'password=mypass' vpn.user-name 'username'

You will need to modify few things in above command

VMWare workstation - ova import not working

2022-07-06 1 min read Virtualization VMWare Workstation

VMWare workstation - ova import not working

When importing ova and/or ovf files, if Workstation does not give any error but does not import the file as well, try importing the file in VMWare Player. When you do that, you will see that if the import fails, player will show a dialogue with log file name similar to /tmp/vmaware-<amitag>/.

From there, I was able to find out that, it was running ovftool.bin. Try to run that in a terminal and immediately I could see that libnsl was missing so, I just installed the same with

Firefox addons for hacking

2022-04-23 1 min read Learning Hacking Firefox

#Firefox addons

Here are some good and useful addons for hacking. I have mentioned some old addons which are quire good but not to be found on firefox addon site :(

Creating and using ackrc

2022-04-02 1 min read Learning Ack Grep Fedora

ack is a fantastic replacement for grep and probably much more than grep. Here is what the dnf info has to say about ack

1
2
3
4
5
6


Name         : ack
Architecture : noarch
Summary      : Grep-like text finder
URL          : http://beyondgrep.com/
License      : Artistic 2.0
Description  : Ack is designed as a replacement for grep.

And their websites says -

Designed for programmers with large heterogeneous trees of source code, ack is written in portable Perl 5 and takes advantage of the power of Perl’s regular expressions.
Continue reading

mussh-run-commands-on-multiple-hosts

2022-03-06 1 min read Learning Bash Fedora SSH

mussh allows you to run command/commands on multiple hosts at the same time. If you have farm of server setup with passwordless ssh or with same password (which is generally the case), then using mussh you can either check all the servers for some output or fix something or maybe update all the packages. How cool is that :)

Here is description of this package from dnf repo

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14


Name         : mussh
Version      : 1.0
Release      : 18.fc35
Architecture : noarch
Size         : 20 k
Source       : mussh-1.0-18.fc35.src.rpm
Repository   : fedora
Summary      : Multihost SSH wrapper
URL          : http://www.sourceforge.net/projects/mussh
License      : GPL+
Description  : Mussh is a shell script that allows you to execute a command or
             : script over ssh on multiple hosts with one command. When possible
             : mussh will use ssh-agent and RSA/DSA keys to minimize the need to
             : enter your password more than once.

virt-install with cloud-init

2022-02-09 2 min read Learning Bash Virtualization Qemu Libvirtd

If you have not heard about cloud-init then you should definately search for it and learn about cloud-config as well. You can find the documentation for cloud-config here. It is used for configuring VMs when running in cloud environments. Specially useful to inject the ssh keys or set the root password but you can do anything in the cloud-config as there is a section where you can run bash commands. While this is useful for cloud instances, you can make use of this feature when running your vm with qemu or libvirtd. All you need to do is either attach a iso disc with user-data and meta-data files in it or even simpler, you can use virt-install command. The command that I use is as follows

Older posts Newer posts