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https://github.com/vkbo/scripts

Various useful scripts
https://github.com/vkbo/scripts

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Various useful scripts

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## Useful Scripts



This is my public script repository. Some of these scripts are also in Gist, but I don't like the

way Gist works, so I moved them here in stead.



Below is a brief description of some of the scripts in this repository. Since I mainly work on

Linux, most of these are Linux scripts. However the Python scripts may or may not work on other

operating systems.



### hashDir



The hashDir Python can be used to regularly check the integrity of a directory structure. The tools

has a set of switches that allow you to choose whether to list, check, maintain or update the

content of a folder, recursively.



The tool will detect changes to file data, deleted files, newly added files, file renames and

duplicate files. It does this by using the standard MD5 hashing algorithm. The decision to use MD5

is primarily for speed since this is not a security tool. The MD5 algorithm is not safe for other

uses.



The tool creates a folder in the current working directory names "Hash". (The folder can be changed

by specifying `--md5dir`.) It also keeps a backup of previous hash files when it is in writing

mode, so it never overwrites the latest hash file.



The hash file itself is a valid .md5 hash file and can be used with the standard

`md5sum -c ` command.



Usage Example:



Scan all files in your Documents folder, and check their hash against previous values.



```bash

ch ~

python hashDir.py --update Documents

```



Scan all files in your Documents folder, but don't check already known files.



```bash

ch ~

python hashDir.py --maintain Documents

```



Check the integrity of all files in the folder against previous hash file.



```bash

ch ~

python hashDir.py --check Documents

```



### 7zBackup



An automated full or differential backup script I wrote for my Syncthing data storage on my server.

The usage is straight forwards. Run the script with the folder to archive. If they are all in one

location, you can set a common root path in the settings section of the script. Otherwise just set

it to /.



The backup destination is also set in the script.



To request a differential backup pass DIFF as the second argument. Otherwise a full backup will be

made. If a differential backup is requested, but a full reference backup is not found, it will fall

back to a full backup.



A sample cron script is added, and contains my current setup.



### autoParity



A simple script that generates parity files for all files in a folder, and make sure the recovery

blocks are sufficient to recreate any one missing file. It's just a wrapper for par2 that

calculates the relative size of the largest file compared to the total size of all files.



### autoShutdown



A simple Python script that monitors the network connection, and shut down the host if the network

has been down for a certain amount of time.



This is a simple way to shut down in case of power loss when the machine itself is on a simple UPS,

and the network is not. I.e. if the netfork is down, the power is likely out.



### checkSha



A simple script to check a file against its shasum when you have the shasum on the clipboard.



### compressPDF



A simple script that reduces file size of large PDFs. I think i got it from StackExchange

somewhere.



### ipCalc



A Simple script that will calculate the network config for a given IP/mask. I made the script to

calculate the firewall settings to block IP ranges trying to brute force login on an 

nternet-facing PC I used to work on. I got *a lot* of brute force attempts on that PC.



### webm2gif



Convert a webm video file (like the one generated from the screencast tool in Gnome) to an animated

gif. It also tries to make the gif small.