ivbor7

Terminal commands Cheat Sheet

---

echo $-             # shows the attributes enabled on the shell
[[ $- == *i* ]] && echo 'Interactive' || echo 'not-interactive'   # detect if you are in an interactive or non-interactive shell with
echo $0                 # display if the login_shell or not login_shell is used
shopt login_shell       # the same meaning as above command 
echo $SHELL             # display which shell is used

ivbor7

Create the file /root/rbash.sh (this can be any name or path, but should be chown root:root and chmod 700):

#!/bin/bash

commands=("man" "pwd" "ls" "whoami")
timestamp(){ date +'%Y-%m-%s %H:%M:%S'; }
log(){ echo -e "$(timestamp)\t$1\t$(whoami)\t$2" > /var/log/rbash.log; }
trycmd()
{

ivbor7

#read a file from the command line without using the cat command 
```sh
$ while IFS= read -r line; do echo $line; done < file.txt
```

#bash script and read any file line by line
```sh
#!/bin/bash
n=1
while IFS= read -r line; do

ivbor7

1. pg_dump is a nifty utility designed to output a series of SQL statements that describes the schema and data of your database. You can control what goes into your backup by using additional flags.
   Backup: pg_dump -h localhost -p 5432 -U postgres -d mydb > backup.sql

   Restore: psql -h localhost -p 5432 -U postgres -d mydb < backup.sql

   -h is for host.
   -p is for port.
   -U is for username.
   -d is for database.

ivbor7

while [ ! -f /tmp/wait-script.sh ]
do
  sleep .2
done
chmod 755 /tmp/wait-script.sh; /tmp/wait-script.sh

ivbor7

Common Options

-#, --progress-bar Make curl display a simple progress bar instead of the more informational standard meter.

-b, --cookie <name=data> Supply cookie with request. If no =, then specifies the cookie file to use (see -c).

-c, --cookie-jar <file name> File to save response cookies to.

ivbor7

Project Title

One Paragraph of project description goes here

Getting Started

These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.

Prerequisites

ivbor7

# ssh key generator data source expects the below 3 inputs, and produces 3 outputs for use:
#  "${data.external.ssh_key_generator.result.public_key}" (contents)
#  "${data.external.ssh_key_generator.result.private_key}" (contents)
#  "${data.external.ssh_key_generator.result.private_key_file}" (path)
data "external" "ssh_key_generator" {
  program = ["bash", "${path.root}/../ssh_key_generator.sh"]

  query = {
    customer_name = "${var.customer_name}"
    customer_group = "${var.customer_group}"

ivbor7

#!/bin/bash

#---------------------------------------------------------
# Usage: sudo ./collect_data.sh <network-interface-name>
#---------------------------------------------------------

# Define some variables
LOGFILE=/tmp/tcp_conf.log
DateStr=$(date +"%Y-%m-%d %H:%M:%S")