bash

exec 2>&-

n<&-

n>&-

0<&-, <&-

1>&-, >&-

2>&-

To move all files, even with weird special characters in the filename, to another directory do this:

$ find . -print0 | xargs --null mv --target-dir=<DIRECTORY>

command > file 2>&1

For this to work the file ~/.bash_profile must be modified to enable the line source ~/.bashrc.

TEMP=`getopt -o c --long complete -n "$0" -- "$@"`
if [ $? != 0 ]; then
  echo "Syntax error." >&2
  exit 1
fi

eval set -- "$TEMP"

while true; do
  case "${1}" in
    -c|--complete)
      DO_IT_HERE
      ;;
    --)   # finished parsing options
      shift
      break
      ;;
    *)
      echo "Internal error." >&2
      exit 1
      ;;
  esac

  shift
done

This piece of code is espcially useful when expanding path information in bash scripts like $PATH or $LD_LIBRARY_PATH:

FOO=${FOO+$FOO:}/usr/local/lib

Given the variable foo=/tmp/my.dir/filename.tar.gz, we can use these expressions:

• path=${foo%/*} ⇒ /tmp/my.dir
• file=${foo##*/} ⇒ filename.tar.gz
• base = ${file%%.*} ⇒ filename
• ext = ${file#*.} ⇒ tar.gz

To split a string, use this expression:

$ set -- $(IFS=":"; echo ${VARIABLE})

Afterwards, $1, $2, … contain the splitted values.

When the “smart” bash completion gets in your way you can completely remove all functions by

complete -r

To see a short help try

help complete