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check command existence, get script dir...
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| ### CHECK IF COMMAND IS AVAILABLE ### | |
| command -v foo >/dev/null 2>&1 | |
| if [ $? -eq 0 ]; then | |
| #Command found | |
| else | |
| #command not found | |
| fi | |
| ###GET SCRIPT DIRECTORY #### | |
| DIR="$( cd "$( dirname "$0" )" && pwd )" |
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