In the above case, we see that the system admin created a script but he did not give permission to the user as he was unable to execute it so to go into depth about this let’s explain how can we set file permission and how to check them.

Solution:  Now for the above  example the system admin only have to give or set  the user file permission to execute so that he can execute that file.

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Let there are some situations in which you have to save your output in a file ( generally called log file). Output can be user details ( username, password, Gmail, etc. ), products record ( buying or selling any goods ), or simply any kind of data that you can store in a log file.

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We can simply get user input from the read command in BASH. It provides a lot of options and arguments along with it for more flexible usage, but we’ll cover them in the next few sections.

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Microsoft Excel allows its users to store and manage different varieties of data in the form of rows and columns and store it inside an Excel workbook. Since Microsoft Excel allows its users to not only store data but also manipulate that data later on as per their needs.

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The following approach will be utilized to parse the CSV File using PHP, which is described below:

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To convert an array into a CSV file we can use fputcsv() function. The fputcsv() function is used to format a line as CSV (comma separated values) file and writes it to an open file. The file which has to be read and the fields are sent as parameters to the fputcsv() function and it returns the length of the written string on success or FALSE on failure.

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The disk_free_space() function in PHP is an inbuilt function which is used to return the amount of free space in a specified directory. The disk_free_space() function denotes the free space in bytes.

It returns the available space on a filesystem or on a disk partition. The disk_free_space() function returns the number of bytes available on the corresponding filesystem or disk partition for a specified directory inputted as a string.

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The disk_total_space() function in PHP is an inbuilt function which is used to return the total space of a specified directory. The disk_total_space() function denotes the total space in bytes. It returns the total space on a filesystem or on a disk partition.

The disk_total_space() function returns the total number of bytes on the corresponding filesystem or disk partition for a specified directory inputted as a string.

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The fflush() function in PHP is an inbuilt function which is used to write all the buffered output to an open file. The fflush() function forces a write of all buffered output to the resource pointed to by the file handle. The fflush() function returns true on success and false on failure.

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Duplicates are those which appear more than one time.

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