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cleanup and final comments

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Vlad Doster 2020-04-10 15:39:56 -05:00 committed by GitHub
parent 53f2f2c3ac
commit 2feb276f2f
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1 changed files with 4 additions and 5 deletions
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9
.local/bin/delete_certain_known_hosts
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@ -1,20 +1,20 @@
#!/bin/bash #!/bin/bash
# Deletes certain lines of ~/.ssh/known_hosts # Deletes certain lines of ~/.ssh/known_hosts
# Check if any args passed # Check if any args passed
if [ $# -eq 0 ]; then if [ $# -eq 0 ]; then
echo "Usage: ./delete_certain_known_hosts 3 5 7 23" echo "Usage: ./delete_certain_known_hosts 3 5 7 23"
echo "Will catch duplicate line numbers" echo "Will catch duplicate line numbers"
exit 1 exit 1
fi fi
# Set variables
# Set loop variables
known_hosts_path=~/.ssh/known_hosts known_hosts_path=~/.ssh/known_hosts
lines_in_known_hosts=$(wc -l "$known_hosts_path" | awk '{print $1}') lines_in_known_hosts=$(wc -l "$known_hosts_path" | awk '{print $1}')
lines_to_delete=""
# Dedupe, sort numerically, and create array from args string
IFS=' ' IFS=' '
deduped_args=$(echo "$@" | xargs -n1 | sort -nu | xargs) deduped_args=$(echo "$@" | xargs -n1 | sort -nu | xargs)
read -r -a delete_these_lines <<< "$deduped_args" read -r -a delete_these_lines <<< "$deduped_args"
lines_to_delete="" # Loop through creating sed expression
for var in "${delete_these_lines[@]}"; do for var in "${delete_these_lines[@]}"; do
if [[ "$var" -gt "$lines_in_known_hosts" ]]; then if [[ "$var" -gt "$lines_in_known_hosts" ]]; then
echo "$var is invalid line in $lines_in_known_hosts line $known_hosts_path" echo "$var is invalid line in $lines_in_known_hosts line $known_hosts_path"
@ -22,7 +22,6 @@ else
lines_to_delete+="${var}d;" lines_to_delete+="${var}d;"
fi fi
done done
# Output information to user about what happened # Output information to user about what happened
if [[ -z "$lines_to_delete" ]]; then if [[ -z "$lines_to_delete" ]]; then
echo "All arguments passed were invalid lines in $known_hosts_path" echo "All arguments passed were invalid lines in $known_hosts_path"