How to check the ability to connect via SSH from a script?

Question

bash

How to check that after starting the remote machine SSH started. That is, if it does not start, then wait, and if it starts, then copy files to / from it using SCP.

Answer 1

usually, when a program succeeds, it returns an exit code. success - 0(zero), any other than zero - failure
you can immediately run scpto copy. if ssh is not running, the result will be failure
so you can start an endless loop and try to work with the server using ssh, using scpuntil the result is 0. as soon as you get it 0, exit the loop - in this case, the files will be downloaded,
you can pause between attempts to connect so as not to hammer the server

Answer 2

Connect:
ssh [email protected]
After entering the command, it will ask for a password. You can also optionally put the -p key if ssh is on some custom port. Accordingly, if connected - everything is ok with SSH.
With csp, everything is simple. 2 examples below:
1. Copy the file "file.txt" from the remote server to the local computer.
2. Copy the file "file.txt" from the local computer to the remote server.

scp file.txt [email protected]:/some/remote/directory

Answer 3

Hello, how to make these arrows fit the bootstrap?

position: absolute
negative margin-top centered via flex or margin: 0 auto
bootstrap classes don't do this, non-standard element, handles.

Answer 4

Through nth-child and hang on :before/:after