Linux Fundamentals Part 2

https://tryhackme.com/room/linux2

Task 1 Intro

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Deploy the machine attached to this task!

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Task 2 SSH - Intro

SSH is the act of remotely accessing a machine. SSH allows you to run commands interactively on the remote machine. This is done through the use of a program on the target machine, which allows the ssh client to interface with the target host.

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Task 3 Putty and SSH

The syntax on how to use this command is ssh <user>@<host>.

SSH into the server

• username: shiba2

• password: pinguftw

ssh shiba2@

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Task 4 [Section 4: Linux Operators]: "&&"

&& means as you might expect "and". Meaning && allows you to execute a second command after the first one has executed successfully.

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Task 5 [Section 4: Linux Operators]: "&"

& is a background operator, meaning say you run a command that takes 10 seconds to run, normally you wouldn't be able to run commands during that period; however, with & that command will still execute and you'll be able to run other commands.

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Task 6 [Section 4: Linux Operators]: "$"

The $ is an unusually special operator, as it is used to denote environment variables.

touch $USER

Environment variables can also be set pretty easily, just running export <varname>=<value> will set that as an environment variable

How would you set nootnoot equal to 1111

export nootnoot=1111

What is the value of the home environment variable

echo $HOME

/home/shiba2

Task 7 [Section 4: Linux Operators]: "|"

The pipe is unique because while operators like >> allow you to store the output of a command, the | operator allows you to take the output of a command and use it as input for a second command.

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Task 8 [Section 4: Linux Operators] - ";"

The ; operator works a lot like &&, however it does not require the first command to execute successfully.

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Task 9 [Section 4: Linux Operators]: ">"

> is the operator for output redirection.

How would you output twenty to a file called test

echo twenty > test

Task 10 [Section 4: Linux Operators]: ">>"

>> does mainly the same thing as >, with one key difference. >> appends the output of a command to a file, instead of erasing it.

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Task 11 Binary - shiba2

What is shiba3's password

echo $USER
export test1234=shiba2
./shiba2 

happynootnoises

Task 12 [Section 5 - Advanced File Operations]: Intro

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Task 13 [Section 5 - Advanced File Operators]: A bit of background.

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Task 14 [Section 5: Advanced File Operations]: chown

How would you change the owner of file to paradox

chown paradox file

What about the owner and the group of file to paradox

chown paradox:paradox file

What flag allows you to operate on every file in the directory at once?

-R

Task 15 [Section 5: Advanced File Operations]: chmod

chmod <permissions> <file>

What permissions mean the user can read the file, the group can read and write to the file, and no one else can read, write or execute the file?

460

What permissions mean the user can read, write, and execute the file, the group can read, write, and execute the file, and everyone else can read, write, and execute the file.

777

Task 16 [Section 5: Advanced File Operations]: rm

rm means remove

What flag deletes every file in a directory

-r

How do you suppress all warning prompts

-f

Task 17 [Section 5: Advanced File Operations]: mv

mv allows you to move files from one place to another.

How would you move file to /tmp

mv file /tmp

Task 18 Linux Fundamentals 3

Join the Linux Fundamentals 3 room, and finish learning Linux: https://tryhackme.com/room/linux3

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