Store number in a directory

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How to manipulate a text file and store each version for every changes in a directory?

I attached both picturehttps://1drv.ms/t/s!Aoomvi55MLAQh1jODfUxa-xurns_ and *.txt file of a sample work file. In this file Reactions which only start with "r1f", "r2f", "r3f"......and so on. And for each reaction the reaction rates is situated couple of lines later with a "+" sign. For each...

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store information in hash and display number of keys.

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How to store files names from a directory to an array

Hi I want to store the file names into an array. I have written like this but I am getting error. declare -A arr_Filenames ls -l *.log | set -A arr_Filenames $(awk '{print $9}') index=0 while (( $index < ${#arr_Filenames })); do Current_Filename=${arr_Filenames} ...

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How to store a number along with the sign

If I use the below cut -c37-48, the minus sign does not get appended to the number, as the sign is in the 36th Position. But, If I use cut -c36-48, the minus sign appears infront of the number, but for positive numbers, it throws an error. How can this be resolved..

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What amount of store occupy only files in a directory?

Hello I'm trying to do an exercise programming in bash where I have to get only the store of files in a directory but NOT all capacity of the directory. I probe with: du -sh "$directory"*` but I get all the capacity and I probe with ls command but I couldnt. Are there any way to get only files...

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Using GREP/AWK to extract a number and store it as a variable

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What is the Maximum number of characters that i can store in a variable?

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Shell Programming and Scripting