What is the reason and how to avoid the [FIN, ACK] , [RST] and [RST, ACK]

Here is a rough explanation of the concepts. [ACK] is the acknowledgement that the previously sent data packet was received. [FIN] is sent by a host when it wants to terminate the connection; the TCP protocol requires both endpoints to send the termination request (i.e. FIN). So, suppose host A sends a data packet to host B and then host B wants … Read more

Using ls to list directories and their total sizes

Try something like: short version of: Explanation: du: Disk Usage -s: Display a summary for each specified file. (Equivalent to -d 0) -h: “Human-readable” output. Use unit suffixes: Byte, Kibibyte (KiB), Mebibyte (MiB), Gibibyte (GiB), Tebibyte (TiB) and Pebibyte (PiB). (BASE2)

Implementation of multiple pipes in C

I believe the issue here is that your waiting and closing inside the same loop that’s creating children. On the first iteration, the child will exec (which will destroy the child program, overwriting it with your first command) and then the parent closes all of its file descriptors and waits for the child to finish … Read more

node.js: cannot find module ‘request’

Go to directory of your project Make this directory a root of your project (this will create a default package.json file) Install required npm module and save it as a project dependency (it will appear in package.json) Create a test.js file in project directory with code from package example Your project directory should look like this Now just run node … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)