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November 6, 2017 01:38
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Bash script tricks
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| #!/bin/sh | |
| # make sure we aren't running already | |
| what=`basename $0` | |
| for p in `ps h -o pid -C $what`; do | |
| if [ $p != $$ ]; then | |
| exit 0 | |
| fi | |
| done |
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