zipizap

#!/bin/bash

[[ -r $1 ]] || { echo "Usage: $0 <videofile-to-be-resized> [<videofile2> ...]"; exit 1; }

for INPUT_FILE in "$@"; do
  OUTPUT_MP4_FILE=$(echo "$INPUT_FILE" | sed 's/\.[^.]*$/_resized.mp4/g')
  #See https://trac.ffmpeg.org/wiki/x264EncodingGuide
  avconv -y -i "$INPUT_FILE" -threads auto -c:v libx264 -preset medium -b:v 988k -pass 1 -an -f mp4 /dev/null && \
  avconv    -i "$INPUT_FILE" -threads auto -c:v libx264 -preset medium -b:v 988k -pass 2 -c:a libmp3lame -b:a 192k "$OUTPUT_MP4_FILE"
  rm -f av2pass* &>/dev/null

zipizap

#!/bin/bash
[[ $# -gt 1 ]] || { echo "Usage: $0 <arg1> <arg2> ... <argN>"; exit 255; }

echo 'Dont forget to surround the "$@" with the double-quotes '' so that it does not divide arguments that contain spaces.'
echo 'Samewise, you also need to surround the "$ARG_I" var'
for ARG_I in "$@"; do 
  echo '$@     = '"$@"
  echo '$ARG_I = '"$ARG_I" 
done

zipizap

function run_as_user { 
  local NEW_USER=$1
  local CMDS=$2
  sudo -u $NEW_USER -i bash -l -c "$CMDS"
}

#Use it like
run_as_user luke "echo $PWD; id"

zipizap

#!/usr/bin/env bash

# In bash all variables are defined by default as GLOBAL, even if defined inside functions

# To define a variable as LOCAL to a function, we have to prepend "local" in the definition
# This makes the variable only defined in the current function scope and so not global.

VAR_GLOBAL="im global - you can read and change me from anywhere, even inside functions - which may not always be a good thing"
echo "Seen from outside: $VAR_GLOBAL"
function my_func {

zipizap

# 
# This gist is related to C Evan's comment on 
# http://zipizap.wordpress.com/2012/10/15/xkl-ubuntu-install-resizing-ntfs-partition-takes-too-long-check-ntfsresize-from-console-with-strace/
#

# Hi Evans :)
# 
# I see what you mean: only strace the writes to stdout, and not all writes that 
# also contain moved data of the resize... And it got me interested in better understanding 
# the strace options, so I did a little "man strace" study and then a little program in C 

zipizap

red@ownc:/tmp$ cat a.sh
#!/bin/bash

# Activate debug
set -x

echo "hi"
ls
pwd

zipizap

du -k . | egrep -v '\/.*\/' | sort -n

zipizap

#!/bin/bash

[[ -r $1 ]] || { echo "Usage: $0 <videofile-to-be-resized> [<videofile2> ...]"; exit 1; }

for INPUT_FILE in $@; do
  OUTPUT_MP4_FILE=$(echo $INPUT_FILE | sed 's/\.[^.]*$/.mp4/g')
  #See https://trac.ffmpeg.org/wiki/x264EncodingGuide
  avconv -y -i $INPUT_FILE -threads auto -c:v libx264 -preset medium -b:v 988k -pass 1 -an -f mp4 /dev/null && \
  avconv    -i $INPUT_FILE -threads auto -c:v libx264 -preset medium -b:v 988k -pass 2 -c:a libmp3lame -b:a 192k $OUTPUT_MP4_FILE
  rm -f av2pass* &>/dev/null

zipizap

#!/bin/bash
function shw_grey { echo -e '\033[1;30m'"$1"'\033[0m'; }
function shw_norm { echo "$1"; }
function shw_info { echo -e '\033[1;34m'"$1"'\033[0m'; }
function shw_warn { echo -e '\033[1;33m'"$1"'\033[0m'; }
function shw_err { echo -e '\033[1;31mERROR: '"$1"'\033[0m'; }

shw_info "Check starting..."
find . -type f  -exec wc -l \{\} 2>&1 \;  | grep error
shw_info "Check finished"

zipizap

# If you put this check inside ~/.bashrc you can detect bash session opened by ssh-logins :)
[ "$SSH_CONNECTION" -a "$SSH_TTY" == $(tty) ] && echo "This bash session was opened from an ssh login :)"