# Linux Ninja Skills - TryHackMe
#### Room Link : [Ninja Skills ](https://tryhackme.com/room/ninjaskills)
Sharpen your ninja skills on linux
## Initial Access
SSH Credentials
```bash
username: new-user
password: new-user
```
## Preparation
First get the list of files that are available to us
```bash
cd files && touch thm-files.txt
## copy and paste the file names into something like, thm-files.txt
```
The list should look something like this
```bash
8V2L
bny0
c4ZX
D8B3
FHl1
oiMO
PFbD
rmfX
SRSq
uqyw
v2Vb
X1Uy
```
Next get the paths of the files which we can later use for reference purpose
```bash
cat thm-files.txt | while IFS= read line; do find / -name "$line" -type f 2>/dev/null; done | tee files.txt
```
## Tasks
#### Question 1 : Which of the above files are owned by the best-group group(enter the answer separated by spaces in alphabetical order)
```bash
cat files.txt | while IFS= read line; do ls -laSh $line; done | grep "best-group"
```
#### Question 2 : Which of these files contain an IP address?
```bash
# Get the IP address along with the file name
cat files.txt| while IFS= read -r line; do grep -E -o '([0-9]{1,3}\.){3}[0-9]{1,3}' "$line" 2>/dev/null && echo "$line"; done
```
#### Question 3 : Which file has the SHA1 hash of 9d54da7584015647ba052173b84d45e8007eba94 ?
```bash
cat files.txt | while IFS= read -r line; do sha1sum $line; done | grep "9d54da7584015647ba052173b84d45e8007eba94"
```
#### Question 4 : Which file contains 230 lines?
```bash
cat files.txt | awk -F/ '{print $NF}' | sort -u > a.txt
cat thm-files.txt | sort -u > b.txt
diff a.txt b.txt
## the one file that is missing is marked with >
```
#### Question 5 : Which file's owner has an ID of 502?
```bash
cat files.txt | while IFS= read -r line; do ls -ln $line; done
# check the 3rd column which has all the IDs
# -rw-rw-r-- 1 502 501 14K Oct 23 2019
```
#### Question 6: Which file is executable by everyone?
```bash
cat files.txt | while IFS= read -r line; do ls -ln $line; done
### Look for -rwxrwxr-x
```
Thank You for reading :heart: Happy Hunting :sunglasses:
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