# Linux

## Privilege Escalation Enumeration

### Root Privilege Related

```shell
sudo -l
find / -type f -perm -u=s 2>/dev/null # or -perm -4000
```

### Password

```shell
find . -type f -exec grep -i -I "PASSWORD" {} /dev/null
```

## Network

### Generating SSL Certificate

```shell
openssl genrsa -des3 -passout pass:x -out keypair.key 2048

openssl rsa -passin pass:x -in keypair.key -out private.key

openssl req -new -key private.key -out sign_request.csr

openssl x509 -req -days 365 -in cert.csr -signkey private.key -out sign_request.crt
```

### Grep IP address

```shell
grep -E -o "([0-9]{1,3}[\.]){3}[0-9]{1,3}" file.txt
```


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