Linux tools

• ssh-keygen - ssh keys generator
• ssh-keyscan 163.185.10.12 - show ssh keys
• xclip - command line copy & paste tool
• sftp - file transfer
• How to Set up SSH Tunneling (Port Forwarding)

Linux - Windows

• WinSCP

Snap

sudo apt update
sudo apt install snapd
# to check
$ sudo snap install hello-world
hello-world 6.4 from Canonical✓ installed
$ hello-world
Hello World!

Powershell

Install via snap

# Install PowerShell
sudo snap install powershell --classic

Install on Ubuntu 16.04

Docker

Install on Ubuntu 18.04

Docker Compose install:

sudo curl -L https://github.com/docker/compose/releases/download/1.25.4/docker-compose-`uname -s`-`uname -m` -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose

Terminal managers

Tmux

Install

sudo apt-get install tmux
tmux

Basic hot keys

Config file .tmux.conf (must be placed in user home directory)

Windows

• Ctrl + b, c - create new window
• Ctrl + b, , - rename window
• Ctrl + b, int - switch between windows (int - window number 0,1,2..)

Panes

• Ctrl + b and Shift + 5 - split current region into two vertical panesx
• Ctrl + b and Shift + “ - split horizontally
• Ctrl + b, ← ↑ → ↓ - moving between panes
• Ctrl + b and o - toggle between panes
• Ctrl + b and x - close current pane
• Ctrl + b, w - interactive pane selection

Connect to closed session: tmux attach

Screen

Install

sudo apt-get install screen
screen

Create config file .screenrc in user’s home directory.

Tab operations

• Ctrl + a, c - create new tab
• Ctrl + a, A - rename tab
• Ctrl + a, int - switch between tabs (int - tab number 0,1,2..)
• Ctrl + a, “ - interactive tab selection

Screen - Regions

• Ctrl + a,

  - split current region into two vertical regions

• Ctrl + a, Tab - change focus to the next region
• Ctrl + a :remove - remove region

Connect to previous closed session: screen -r

Tar

# archive folder package-dir to file package.tar.gz
tar -czvf "package.tar.gz" package-dir

# archive folder without folder name in archive, -C option + *
tar -czvf "package.tar.gz" -C package-dir *

# extract to C:/
tar -C C:/ -xvf package.tar.gz

Less

less is a program that lets us view text files.

Rsync

rsync options source destination

• -h : human-readable, output numbers in a human-readable format
• –include ‘R’ –exclude ‘’
• –delete - removing files at the destination
• –dry-run
• –stats - give some file-transfer stats
• -r, –recursive - recurse into directories -t, –times - preserve modification times
• -h, –human-readable - output numbers in a human-readable format
• –partial - By default, rsync will delete any partially transferred file if the transfer is interrupted. In some circumstances it is more desirable to keep partially transferred files. Using the –partial option tells rsync to keep the partial file which should make a subsequent transfer of the rest of the file much faster.

rsync - man page 11 simple rsync examples that you can use to be more productive

sudo rsync -ra --info=progress2 /var/www/localhost/htdocs/ /media/usb

Chrome

sudo apt update
sudo apt upgrade
wget https://dl.google.com/linux/direct/google-chrome-stable_current_amd64.deb
sudo dpkg -i google-chrome-stable_current_amd64.deb

Curl

• You can see the request that curl sent by adding the -v option

# GET
curl -i -H "Accept: application/json" -H "Content-Type: application/json" http://hostname/resource

# Disable SSL checks
-k, --insecure

# POST
curl --data "param1=value1&param2=value2" http://hostname/resource

# FILE UPLOAD
curl --form "fileupload=@filename.txt" http://hostname/resource

# RESTful HTTP Post:
curl -X POST -d @filename http://hostname/resource

# For logging into a site (auth):
curl -d "username=admin&password=admin&submit=Login" --dump-header headers http://localhost/Login
curl -L -b headers http://localhost/

# POST 2
curl -k -X POST https://100.124.79.6:5131/login \
--header 'Content-Type: application/json' \
--data-raw '{
    "username": "u",
    "password": "p",
    "eauth": "pam"
}'

curl --location --request POST 'https://server:9000' \
--header 'X-Auth-Token: b26433169229f8890a1982e3b5b7bdf652740afe' \
--header 'Content-Type: application/json' \
--header 'Cookie: session_id=b26433169229f8890a1982e3b5b7bdf652740afe' \
--data-raw '{
    "fun": "cmd.run",
    "client": "local",
    "tgt": "*local-cm",
    "arg": ["sudo tool.exe check >/dev/null 2>&1; echo $?"]
}'

WGET

wget --no-check-certificate https://10.1.0.100:5131/login

Alpine Linux

Install app - sudo apk add pciutils