Bash scripts and examples

sha256sum-duplication-checker.sh

#!/bin/sh

SHA256SUMS_FILE="./sha256_sums"
UNIQ_COUNTS_SORTED="./uniq_counts_sorted"


find . -type f -exec sha256sum {} \; > $SHA256SUMS_FILE
cat $SHA256SUMS_FILE | sort -k1 | cut -f1 -d\  | uniq -c |  sed "s:^ *::g" | sort -rk1 > $UNIQ_COUNTS_SORTED

IFS="
"

for i in $(cat $UNIQ_COUNTS_SORTED) ; do
    count=$(echo $i | cut -f1 -d\ )
    sha=$(echo $i | cut -f2 -d\ )

    if [ "$count" -gt 1 ] ; then
        echo "## Duplicate sum: $sha"
        grep --color=never $sha $SHA256SUMS_FILE
        echo
    fi
done > duplicates

wait_for_completion.sh

#!/bin/bash

function wait_for_completion {
    while [ `ps -ef | grep -i $0 | grep -v grep | wc -l` -gt 2 ] ; do
        echo "DEBUG CHECK: `ps -ef | grep -i $0 | grep -v grep | wc -l`"
        sleep 1
    done

    echo "DEBUG END: `ps -ef | grep -i $0 | grep -v grep | wc -l`"
}

for i in {1..10}; do
    val=$(($RANDOM % 10 + 1))
    echo "Item: $i with a random of $val"
    (
        sleep $val
        echo "Finished sleeping... for $val"
    ) &
done

wait_for_completion