> For the complete documentation index, see [llms.txt](https://infra.newerasec.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://infra.newerasec.com/infrastructure-testing/privilege-esclation/situational-awareness/linux.md).

# Linux

The first step when landing on host should be understanding who your against to - what OS, what process are running,  what users exists and more, this can be done by looking at the following files (remember - in Linux everything is a file):

### **Distribution type:** 

`cat /etc/*-release` 

### Kernel version: 

`cat /proc/version` \
`uname -a` 

### view if you can run anything as sudo: (check for GTFObins) 

`Sudo -l` 

### Check common files: 

```
cat /etc/profile 
cat /etc/bashrc 
cat ~/.bash_history 
cat ~/.bashrc 
cat ~/.bash_logout
```

### What services running (filter by root): 

`ps aux` 

`ps -ef` 

`top` 

### Check configuration files: 

```
cat /etc/syslog.conf 
cat /etc/chttp.conf 
cat /etc/lighttpd.conf 
cat /etc/cups/cupsd.conf 
cat /etc/inetd.conf 
cat /etc/apache2/apache2.conf 
cat /etc/my.conf 
cat /etc/httpd/conf/httpd.conf 
cat /opt/lampp/etc/httpd.conf
```

###  Check local ports and what listens: 

`netstat -antup` 

### View list of users: 

`cat /etc/passwd | cut -d: -f1`  

### Search for ssh keys: 

```
cat ~/.ssh/authorized_keys 
cat ~/.ssh/identity.pub 
cat ~/.ssh/identity 
cat ~/.ssh/id_rsa.pub 
cat ~/.ssh/id_rsa 
cat ~/.ssh/id_dsa.pub 
cat ~/.ssh/id_dsa 
cat /etc/ssh/ssh_config 
cat /etc/ssh/sshd_config 
cat /etc/ssh/ssh_host_dsa_key.pub 
cat /etc/ssh/ssh_host_dsa_key 
cat /etc/ssh/ssh_host_rsa_key.pub 
cat /etc/ssh/ssh_host_rsa_key 
cat /etc/ssh/ssh_host_key.pub 
cat /etc/ssh/ssh_host_key 
```

### View crontabs

```
crontab -e root 
crontab -l 
ls -alh /var/spool/cron 
ls -al /etc/ | grep cron 
ls -al /etc/cron* 
cat /etc/cron* 
cat /etc/at.allow 
cat /etc/at.deny 
cat /etc/cron.allow 
cat /etc/cron.deny 
cat /etc/crontab 
cat /etc/anacrontab 
cat /var/spool/cron/crontabs/root 
```

### Web servers files

```
ls -alhR /var/www/ 
ls -alhR /srv/www/htdocs/ 
ls -alhR /usr/local/www/apache22/data/ 
ls -alhR /opt/lampp/htdocs/ 
ls -alhR /var/www/html/ 
```


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://infra.newerasec.com/infrastructure-testing/privilege-esclation/situational-awareness/linux.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.