added unzip

CommonlyUsedPosix.sh

TAR
  tar -cf archive.tar foo bar  # Create archive.tar from files foo and bar.
  tar -tvf archive.tar         # List all files in archive.tar verbosely.
  tar -xf archive.tar          # Extract all files from archive.tar.

# get line 5 to end, then print fifth column, sort, then get uniq. 
sed -n '5,$p' <file> | gawk '{print $5}' | sort | uniq

# remove vss files within folder and sub folders
find . -iname '*.*scc' -type f -print0 | xargs -0 rm

# select lines with `matches` then, using tab as separator, get the first item,
# then get unique items
grep matches <file> | gawk 'BEGIN { FS="\t" } {print $1}' | sort | uniq

# to recusively download content and map internal links to relative links
wget -r -l 0 -w 5 -k "url"

# to recusively download content in one directory and map internal links to relative links
# NOTE: create first a folder where the content are to be downloaded.
wget -r -l 0 -w 5 -k -nd "url"

# restrict download on certain directory of web site
wget -r -w 5 --include-directories=recipes http://web.site/recipes/

# unzip all zip files
unzip '*.zip'