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  • Mar 29 / 2017
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MonitWeb – Architecture and security

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Need further assistance for designing your architecture or get some security insights for an existing app? Get in touch with experts to get custom and complete assistance!

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  • Mar 24 / 2017
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Linux

Create multiple symlink by changing name with command find

Let’s imagine that we have the following directory listing:

We would like to get a copy of those files named 2016 with a new name for the 2017 year, but we need to keep same content and retro-compatibility. For that, it’s easier to create some symbolic links of all those files instead of doing copies.

You can so use this command for creating those symlinks:

We are now getting this, as expected:

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  • Mar 05 / 2017
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Linux

Use wget/curl behind a proxy

If your machine is behind a proxy, you probably configured your browser for going through the proxy to reach Internet. But what about command line with curl and wget?

If you want to add the proxy temporarily for some few installations for example, just type (by replacing URL and port with yours):

If you want to make the changes globally and keep it after a restart (or a new login), you can:

  • Add those lines in ~/.wgetrc to make it available only for wget and for the current user
  • Add those lines in /etc/environment to make it work for either curl/wget or any http relevant command:

If you need authentication, you can simply include username and password in your connection string like:

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  • Feb 24 / 2017
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Linux

Reset root password on Linux

Who never forgot a root password on a running machine that you can’t reinstall totally?

Most of the linux distributions do have a recovery partition that you can use for that on startup (I won’t detail this here). But if you don’t have this partition, you can still reset it using generic commands thanks to grub capabilities.

Here is the procedure for resetting root password on most of the linux distros using GRUB:

  1. Reboot the machine
  2. When you get the GRUB menu, go to edit page by pressing e when highlighting the correct line you want to modify (generally it’s the first one, no need to change)
  3. Go to the kernel line and enter again for editing
  4. Remove the quiet word at the end of the line and replace with that:
  5. Press enter to validate your changes
  6. Press b to boot (that way, changes will only be temporary)
  7. You’re now getting a root bash prompt for your machine
  8. The root filesystem is mounted as readonly by default, you have to mount it as read/write by typing
  9. Use the passwd command to create a new root password (pay attention to keyboard layout that can be different!)
  10. Reboot and log into your server with your freshly created password

You should now be able to connect perfectly to your server with your new password!

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  • Jan 26 / 2017
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Linux

Apache Directory Listing – Download

Some Apache servers do activate the DirectoryIndex so you can easily go through the directories listing over HTTP and download some files. It’ s often used for giving possibility to people to download multiple releases for a package/software.
But in some cases, it can be useful to download the content of a full tree view.

This can be done by using a simple tool available by default on Linux (can be downloaded on Windows/Mac): wget

Let’s take an example!

Without proxy

We want to download all the files on https://pkg.mywebsite.eu/releases/ which contains all the latest releases of our preferred soft.

Here, we are using many options to say to wget what we want to do:

  • -rTurn on recursive retrieving (max 5)
  • -np : Do not ever ascend to the parent directory when retrieving recursively
  • -nH –cut-dirs=1 : Disable generation of host-prefixed directories, and remove 1 level (here, remove “pkg.mywebsite.eu” and create a “releases” dir)
  • -l 15 Change default depth for downloading to 15 levels (default is 5)
  • -R index.html : Specify comma-separated lists of file name suffixes or patterns to reject

With proxy

Let’s now add a complexity, this server is only available through a proxy to protect the content. The proxy is available on your localhost (127.0.0.1) on port 3128 (default port for Squid Proxy):

Here, we just added 2 options to be able to send exactly the same request but using proxy:

  • -e use_proxy=yesExecute command to enable proxy
  • -e http_proxy=127.0.0.1:3128Execute command to give URL to use for HTTP proxy

 

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  • Jan 02 / 2017
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iTerm – Automatic mutliple panes with AppleScript

It’s often very useful to automate opening of multi panes with iTerm to execute many commands or getting access to many servers at the same time. This can be done through AppleScript.

You can copy this script and save it as multi-panes.scpt

Then, you just have to call the script directly:

And here is what you’re getting:

Feel free to add/remove/update the actions as needed!

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