25-03-2025

docs/Raspberry/diet-pi.md

@@ -42,6 +42,13 @@ systemctl status dropbear.service
 DROPBEAR_EXTRA_ARGS=“-w -g”
 ```
 
+Editer et redémarrer Dropbear:
+
+```bash
+root@PiHole1:~# nano /etc/default/dropbear
+root@PiHole1:~# systemctl restart dropbear.service
+```
+
 
 
 #### --help
@@ -95,3 +102,75 @@ Usage: dropbear [options]
 cat ~/.ssh/id_rsa.pub | ssh -p65535 root@192.168.12.116 'cat>> ~/.ssh/authorized_keys'
 ```
 
+
+
+### Log
+
+```bash
+# journalctl --no-pager | grep 'cron'
+```
+
+
+
+| Command                                       | Remark                                                       |
+| :-------------------------------------------- | :----------------------------------------------------------- |
+| `journalctl -u UNITNAME` (`--unit UNITNAME`)  | Displays messages of the given unit                          |
+| `journalctl _PID=<process_id>`                | Displays messages of process with PID equals to <process_id> |
+| `journalctl -r` (`--reverse`)                 | Displays list in reverse order, i.e. newest messages first   |
+| `journalctl -f` (`--follow`)                  | Displays the tail of the log message list and shows new entries *live* |
+| `journalctl -b` (`--boot`)                    | Displays messages since the last boot (i.e. no older messages). See also option `--list-boots` |
+| `journalctl -k` (`--dmesg`)                   | Displays kernel messages                                     |
+| `journalctl -p PRIORITY` (–priority PRIORITY) | Displays messages with the given priority. PRIORITY may be `merg`, `alert`, `crit`, `err`, `warning`, `notice`, `info` and `debug`. Also numbers as PRIORITY are possible |
+| `journalctl -o verbose`                       | Displays additional meta data                                |
+| `journalctl --disk-usage`                     | Displays the amount of disk space used by the logging messages |
+| `journalctl --no-pager | grep <filter>`       | Filters log messages (filtering with `grep`)                 |
+
+
+
+#### Quand sont exécutés les scripts cron.hourly, cron.daily, cron.montly...
+
+```bash
+grep run-parts /etc/crontab
+#*/0 * * * * root cd / && run-parts --report /etc/cron.minutely
+17 * * * * root cd / && run-parts --report /etc/cron.hourly
+25 1 * * * root test -x /usr/sbin/anacron || { cd / && run-parts --report /etc/cron.daily; }
+47 1 * * 7 root test -x /usr/sbin/anacron || { cd / && run-parts --report /etc/cron.weekly; }
+52 1 1 * * root test -x /usr/sbin/anacron || { cd / && run-parts --report /etc/cron.monthly; }
+
+```
+
+#### Exécuter les scripts cron.hourly, cron.daily, cron.montly...
+
+```bash
+run-parts --test /etc/cron.hourly/
+```
+
+#### Ajouter un script à cron.hourly
+
+```bash
+root@PiHole1:/etc/cron.hourly# l
+total 16
+-rw-r--r-- 1 root root  102 Mar  2  2023 .placeholder
+-rwxr-xr-x 1 root root 1311 Aug 27 19:49 dietpi
+-rwxr-xr-x 1 root root  191 Feb 22  2012 fake-hwclock
+-rwxr-xr-x 1 root root   60 Sep  5 09:47 pihole
+```
+
+```bash
+nano /etc/cron.hourly/pihole
+
+#!/bin/bash
+
+#Look for pihole update
+/root/update_pihole.sh
+```
+
+
+
+```bash
+*/2 * * * *		# toutes les 2 minutes
+* */2 * * *		# toutes les 2 heures
+
+0 1 * * 1,3,5	# At 01:00 on Monday, Wednesday, and Friday
+```
+