Connecting Android to your Linux you need to use gvfs. Rsync also wants to set files timestams that is why you need this hack.
For use MTP devices in terminal need to use gvfs-use:
apt install gvfs-fuse
and reboot.
ls /run/user/1000/gvfs
'mtp:host=Samsung_A7_caf675d6'
Next follow to that folder you need to store your data.
Using bash it is possible to compare time easily in epoch format. If you need to compare date like 14:23 with 14:17 you need to transform it to seconds since epoch and compare as two integers. Here it is my function in ~/.bashrc and examples
Starting long process you may want to watch how much time is it going. This helps you to guess how much time remains.
Usually you run some process and then watch on it in another terminal window in a loop `while [ 1 ]`.
For example, need to count minutes since the process start. Algorithm and simple bash script are here.
start=$(date +%s)
This stores start point as POSIX time in seconds like: 1660042758
When update Drupal with composer on VPS with RAM less than 2Gb you may catch errors:
Sometimes my Devuan unexpectedly close the session, because of some JavaScripts on websites. After re-login I cannot connect to remote git repository with errors:
$ ssh remote_server
$ git pull
Error reading response length from authentication socket.
Permission denied (publickey).
fatal: The remote end hung up unexpectedly
Some people advise to start ssh-agent and load keys to ssh-agent, but that does not work in my case:
I use Protovpn and need to choose the fastest free server. All the servers are listed in json file: https://api.protonmail.ch/vpn/logicals Let's try linux jq. First install curl if you have no (apt-get install curl) and download json file: curl https://api.protonmail.ch/vpn/logicals > __tmp_protonvpn
Having systems that need a monitoring or alert about errors and fails you may use Telegram Bot. Next examples of using Telegram Bot help to watch the status of a long process, also to send lines from log, and even more, it is possible to send printscreens or also convert printscreens to text and then send it to your chat in Telegram.
This way you can monitor any process in your system with smartphone in any place.