If like me you do not have a fixed IP addres, you may have to update a DNS record.
And if you use a VPN, you want to update the DNS record with your real IP address.
Here is a bootscript to do that in Python.
Continue reading »Mar 122019
Août 122018
The scality’s RING product is a distributed storage solution, which manages different replication and erasure coding security. – https://www.scality.com/
1. What is a keyspace in the Scality RING
A RING keyspace is a circle starting at 00, ending at FF.
in reality, the numbers are not just 2 character long but 40 characters.
A keyspace is composed of node keyranges.
A keyrange is a space between a key on the keyspace, and the predecessor key.
Fév 202014
On m’a demandé comment copier sans écraser la destination si elle existe.
l’environnement est restreint, pas de rsync et doit tenir dans une ligne.
pas le temps de tester si le fichier existe, ce doit être rapide.
la solution est facile:
# yes |sed 's/y/n/' | cp -i source destination
Nov 222013
Here is my custom PS1 for GIT.
You can see if you are in a GIT tree, the current branch and the status of the branch (the + or the – before the branch)
The special command to obtain this kind of prompt is
Juil 042013
Works on Bash only
cidr2dec() {
cidr=$1
totalmask= ; bits=
for ((i=$cidr; $i>0; i--)); do bits="${bits}1" ; done
for ((i=$((32 - $cidr)); $i>0; i--)); do bits="${bits}0" ; done
for i in 1 9 17 25; do
bitmask=$(echo $bits |cut -c${i}-$(($i + 7)))
totalmask=${totalmask}$(echo 'obase=10; ibase=2;' $bitmask |bc).
done
echo ${totalmask%%.}
}
$ for i in 16 24 26 27 32 ; do cidr2dec $i ; done 255.255.0.0 255.255.255.0 255.255.255.192 255.255.255.224 255.255.255.255