rafamdr

# grep cloud-init /var/log/messages

# OR

# tail -f /var/log/messages | grep cloud-init

# Source: https://stackoverflow.com/questions/50255413/var-log-cloud-init-output-log-is-not-present-on-rhel-7-5

rafamdr

# set proxy config via /etc/profile.d - should apply for all users
# You can edit /etc/profile or add a script in /etc/profile.d directory which will be executed /etc/profile script
# After that, you can test executing "source /etc/profile"

PROXY_URL="http://10.102.45.9:8080/"

export http_proxy="$PROXY_URL"
export https_proxy="$PROXY_URL"
export ftp_proxy="$PROXY_URL"
export no_proxy="127.0.0.1,localhost"

rafamdr

#!/bin/bash

trap "trap - SIGTERM && kill -- -$$" SIGINT SIGTERM EXIT
if [ ! "$BASH_VERSION" ] ; then
    exec /bin/bash "$0" "$@"
fi

SERVERS=$(cat <<EOF
10.0.0.1
10.0.0.2

rafamdr

#!/bin/bash
set -e

DIRECTORY=$1

while read -r package; do
  venv/bin/pip install "${package}" -f "$DIRECTORY"/ --no-index
done < requirements.txt

rafamdr

#!/bin/bash

set -e

rm -rf pip_packages
mkdir pip_packages

while read -r package; do
  venv/bin/pip download "${package}" -d pip_packages
done < requirements.txt

rafamdr

# Setting up openssh-server (1:6.6p1-2ubuntu2.10) ...
# update-rc.d: warning: default stop runlevel arguments (0 1 6) do not match ssh Default-Stop values (none)
# invoke-rc.d: initscript ssh, action "restart" failed.
# dpkg: error processing package openssh-server (--configure):
#  subprocess installed post-installation script returned error exit status 1
# Errors were encountered while processing:
#  openssh-server
# E: Sub-process /usr/bin/dpkg returned an error code (1)

  

rafamdr

wget -r -nH --cut-dirs=5 -nc ftp://user:pass@server//absolute/path/to/directory


# -nH avoids the creation of a directory named after the server name
# -nc avoids creating a new file if it already exists on the destination (it is just skipped)
# --cut-dirs=5 allows to take the content of /absolute/path/to/directory and to put it in the directory where you launch wget. The number 5 is used to filter out the 5 components of the path. The double slash means an extra component.

# Source: https://stackoverflow.com/questions/113886/how-to-recursively-download-a-folder-via-ftp-on-linux#answer-5567776:~:text=Just%20to%20complement%20the%20answer%20given%20by%20Thibaut%20Barr%C3%A8re.

rafamdr

sudo -u devil -- sh -c "whoami; cd ~/ && pwd"

# Expected result
# devil
# /some/hell/path/devil

rafamdr

#!/bin/bash
#!/usr/bin/expect

if [ ! "$BASH_VERSION" ] ; then
    exec /bin/bash "$0" "$@"
fi

echo -n "SSH User":
read -r sshusertemp

rafamdr

cat hadoop_file.bin | gzip -d