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@yeasy yeasy/Bash scripts
Last active Dec 20, 2016

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## Check params number is 1
if [ "$#" -ne 1 ]; then
echo "Number of parameters is not one"
## Check a variable is empty
[ -z "$var" ] && echo "Empty" || echo "Not empty"
## Check a cmd exists or not
command -v wget >/dev/null 2>&1 || { echo >&2 "wget is not installed. Aborting."; exit 1; }
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