We made a mango pickle with green mangoes. Below is the typical recipe that was used:  20 small tender green mangoes 200g salt 2tsp. turmeric powder 2” asafoetida (rock type) 1 tbsp. peppercorns 3 tbsps. Mustard seeds ¼ tsp. fenutgreekseeds 2 tbsps. Mustard dal 100g red chilli powder 1 sp. Turmeric powder 500ml sesame seed oil   Preparation :  Wash and wipe the mangoes thoroughly. Slit them into fours. Chop 4 or 5 mangoes into cubes.  Sprinkle the salt and turmeric powder on all the mangoes, mix them well ands place in a plastic or wooden vessel. Keep heavy weight over the mangoes and leave them for 4 days.  Daily, turn the mangoes gently, upside down to ensure that the natural green colour of the mangoes has changed. Drain out the grime and salt if any into a pan and boil it. Cool.  Meanwhile remove the soft seeds from each of the mangoes carefully. Remove the black skin too if any. Should there be any hard seed, do not remove it. Next, heat a tablespoon of oil in a small pan, keep the flame low and toss in the asafoetida. Remove it after a minute. Repeat with peppercorns, mustard and fenugreek seeds. Cool the spices and grind fine. Do not use nay water. Heat the remaining oil in another pan and cool thoroughly. Now mix the chilli powder with mustard dal, turmeric powder and the ground spice, add salt (the mixture should be slightly salty). Mix some cooled oil into spice mixture. Stuff each mango with a small lump of the spice paste. Place all the stuffed mangoes in a wide mouthed jar. Pour the grime and the remaining heated and cooled oil.  Now 3 days later this pickle is foaming with gas.  How can I prevent this from happening.  What am I doing wrong.  I have seen some of your posts and you seem to have a lot of experience in this area.
I am trying to pickle some mangoes the Indian way. I boiled the jar in hot water, dried it and then added the mixture of spices, salt and mangoes to the jars after the mixture had cooled. I made the mixture in a frying pan to try and remove as much water as I could. After it was cooled, I put it in the jar and heated some mustard oil till it just barely started smoking. I let that cool and poured it over the mango spice mixture.  For the first three days it was fine. On the fourth day, I opened it to test the taste and ended up adding more salt. Now, there seems to be gas forming in the jar. I've noticed it a few times now. When I open the jar, I hear a whooshing noise as air escapes. It's quite a lot, since I opened the container about 3 times in a 10 hour period and each time gas escaped. Has this pickle gone bad? Or is this something that's normal?
Mathematical expression to form a vector from diagonal elements I would like to know is there any way to express mathematically (using matrices multiplication, addition, etc.) a vector which is formed from the diagonal elements of a matrix. For example, I have a matrix called $\mathbf{M}$ and I want to create a vector  $\mathbf{v}$ such that $\mathbf{v}= \text{diagonal elements of } \mathbf{M} $  Any matrix algebra or operation do that ? Thank you. How do I rename all folders and files to lowercase on Linux? I have to rename a complete folder tree recursively so that no uppercase letter appears anywhere (it's C++ source code, but that shouldn't matter).  Bonus points for ignoring CVS and Subversion version control files/folders. The preferred way would be a shell script, since a shell should be available on any Linux box.  There were some valid arguments about details of the file renaming.   I think files with the same lowercase names should be overwritten; it's the user's problem. 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An extraordinary leader whose vision, values, integrity and boundless curiosity inspires all who follow in his footsteps. When is the graph of the divisor relation on $[n]$ planar? If I have a Java source file (*.java) or a class file (*.class), how can I convert it to a .exe file?  I also need an installer for my program.