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The latest versions of file will tell you the algorithm used on a file encrypted by mcrypt: $ mcrypt $ file mcrypt 2.5 encrypted data, algorithm: rijndael-128, keysize: 32 bytes, mode: cbc,


As @Tejas mentioned, you need to understand umask and its values for changing the default permissions. I recommend you read this article so you'll understand how to use it properly. In addition, you should know that it's not permanent, so after rebooting your system the umask value you've set will be gone. To set it in a permanent way, you need to write a ...

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