It can be done using the following 6 methods.
fallocate: fallocate is used to preallocate or deallocate space to a file. truncate: truncate is used to shrink or extend the size of a file to the specified size. dd: Copy a file, converting and formatting according to the operands. head: head is used to print the first part of files. xfs_mkfile: xfs_mkfile command allow us to create a specific size of a file in Linux. perl: Perl is a programming language specially designed for text editing.
create a 100M file filled with all 0’s. $ dd if=/dev/zero of=100M_filled_with_zeros bs=100M count=1 create a 100M file filled with random data. $ dd if=/dev/urandom of=100M_filled_with_random_data bs=1M count=100
create a 100M file filled with all 0’s. $ head -c 100M /dev/zero > 100M_filled_with_zeros create a 100M file filled with random data. $ head -c 100M /dev/urandom > 100M_filled_with_random_data
openssl rand -out $testfile -base64 792917038; truncate -s-1 $testfile openssl rand -out myfile “$size” If you need base64: openssl rand -base64 -out myfile “$size”
jot -r -c $FILESIZE > $FILE truncate –size 1G foo shred –iterations 1 foo
xfs_mkfile 10M daygeek5.txt
$ base64 /dev/urandom | head –c 10 > random_file.txt $ cat random_file.txt /8ZtS5IfK+
$ tr –dc [:graph:] < /dev/urandom | head –c 10 m1#Vs:ABp
$ tr –dc [:alnum:] < /dev/urandom | head –c 10 miB150lFw2
$ tr –dc [:graph:] < /dev/urandom | head –c 10 > random_file.txt $ cat random_file.txt TKt4r$#Z7r
$ strings -s “” /dev/urandom | head -c 10 BB2!C5./8 $ strings -s “” /dev/urandom | head -c 10 > random_file.txt $ cat random_file.txt 7)XM/F%F;^
To launch Jupyter Notebook App:
Copy this script and save it in file
#!/bin/bash
source "/[yourenv if you install it in env ]/bin/activate" # if you use venv
jupyter-lab --notebook-dir=$PWD # use $PWD for open here
GNOME Files, formerly and internally known as Nautilus, is the official file manager for the GNOME desktop Nautilus script is an executable shell script that is placed in a special scripts directory so that the Nautilus graphical shell can find it. This allows you to extend the functionality of the file browser to do just about anything.
~/.local/share/nautilus/scripts/
Copy script in Gnome scripts path and change file permission
chmod a+x [yourscript]
Righclick on folder and select yourscript done
Do you have a question?
]]>vagrant plugin install vagrant-cachier
Vagrant.configure("2") do |config|
config.vm.box = 'your-box'
if Vagrant.has_plugin?("vagrant-cachier")
config.cache.scope = :box
config.cache.synced_folder_opts = {
type: :nfs,
mount_options: ['rw', 'vers=3', 'tcp', 'nolock']
}
end
end
When you try to use a Vagrant-cachier with Fedora, you get an error like this
VagrantPlugins::Cachier::Bucket::Dnf
/install_buckets.rb:43:in `block in configure_cache_buckets'
/root/.vagrant.d/gems/2.6.6/gems/vagrant-cachier-1.2.1/lib/vagrant-cachier/bucket.rb:23:in `install': uninitialized constant VagrantPlugins::Cachier::Bucket::Dnf (NameError)
or
Vagrant assumes that this means the command failed!
sed -i 's/keepcache=0/keepcache=1/g' /etc/yum.conf
Stdout from the command:
Stderr from the command:
sed: can't read /etc/yum.conf: No such file or directory
Using git, you must manually update it
vagrant-cachier have 5 Releases latest one is v1.2.0 on Jan 14, 2015
dnf plugin patch for vagrant-cachier Merge pull request on Nov 22, 2016
This project is looking for maintainers so update is not in repository
use git to clone project
git clone https://github.com/fgrehm/vagrant-cachier
You must go to the location where you installed Vagrant
/[your_user]/.vagrant.d/gems/2.6.6/gems/vagrant-cachier-1.2.1/lib/vagrant-cachier/
Sync to folder
**dont use this plugin for Fedora and dnf **
done Do you have a question?
]]>Answer :
The reason for this situation is that in this DHCP server, the default gateway value is not set and only gives the IP That is why ESXI does not accept this IP from DHCP.
So you need to make sure your DHCP sets the default gateway value.
]]>It is very easy just
open apt.conf in /etc/apt/apt.conf with your favorites editor for example use xed in Linux mint (If the file in path it is not exist make it :D)
xed /etc/apt/apt.conf
and add this code in it
Acquire::http::Proxy “socks5h://your_proxy_server:port”;
]]>Years after the introduction of C#, the prevalence of very big mistakes or misunderstand in computer society. Call # Sharp again of the number sign For example when a junior programmer or junior computer scientist saw a # in Twitter some of them call it sharp :O or hashtag although hash is another name for number sign, you can not call it sharp when you saw it on most of the web. In this article we are going to discuss, what is different between symbol # we known as the number sign, hash “#” and music symbol, sharp, means higher in pitch and we write it “♯” (U+266F in Unicode)
Why the Microsoft call it new programming languages C Sharp? Microsoft wants to introduce a higher-level programming language from C++ with more facilities. They looking for new symbols and they find sharp. The sharp symbol is so perfect because it looks like 4 plus ++++ and it means higher in pitch in music. They had a very big problem.
You can not type sharp directly from the keyboard :(. so they decide to choose hashtag along sharp
In conclusion, although we write C# (pronounce c sharp), this # a lonely pronounce number sign or hash
]]>