Added Linux/processes page

Linux/processes.md

@@ -0,0 +1,41 @@
+# Process interaction snippets
+
+## Find process occupying port
+
+```
+ss -lptn 'sport = :5173'
+```
+
+### Output example:
+
+```
+State                 Recv-Q                Send-Q                               Local Address:Port                                 Peer Address:Port                Process                                          
+LISTEN                0                     511                                          [::1]:5173                                         [::]:*                    users:(("node",pid=29634,fd=32))
+```
+
+## Kill process
+
+```
+sudo kill -[signal] [PID]
+```
+
+### Example:
+
+```
+sudo kill -9 29634
+```
+
+### Signals:
+- **SIGTERM (Signal 15).** This signal asks for a process to terminate. The process can capture this signal, perform cleanup operations, and then exit. By default, the kill command sends SIGTERM if no other signal is specified.
+
+- **SIGKILL (Signal 9).** It forcefully kills a process. The process cannot capture or ignore this signal, which results in an immediate termination. It should be used as a last resort when a process doesn’t respond to SIGTERM.
+
+- **SIGINT (Signal 2).** This is typically sent when you press Ctrl + C in the terminal. It interrupts a process and is usually used to stop a process running in the foreground.
+
+- **SIGHUP (Signal 1).** Sent to a process when its controlling terminal is closed and often used to reload configuration files.
+
+- **SIGQUIT (Signal 3).** Causes a process to terminate and produce a core dump file for debugging.
+
+- **SIGSTOP (Signal 19).** Pauses a process without killing it, similar to pressing Ctrl + Z in the terminal.
+
+- **SIGCONT (Signal 18).** Continues a process that was stopped by SIGSTOP or Ctrl + Z.

Readme.md

@@ -9,6 +9,7 @@ This is a repository with useful snippets of various kinds of code
 - - [common](./src/branch/master/Git/common.md)
 - [Linux](./src/branch/master/Linux/)
 - - [certbot_nginx](./src/branch/master/Linux/certbot_nginx.md)
+- - [processes](./src/branch/master/Linux/processes.md)
 - [MySQL](./src/branch/master/MySQL)
 - - [all_foreign_keys_to_table_or_column](./src/branch/master/MySQL/all_foreign_keys_to_table_or_column.md)
 - - [identify_lock](./src/branch/master/MySQL/identify_lock.md)