Loops
For loop
#!/bin/bash
for i in $(cat ips); do
echo quit | timeout --signal=9 3 telnet "$i" 443
done
for s in $ONE $TWO $THREE
do
echo "Server ${s}"
done
Run a command for each entry
This script defines an array of IDs and uses a for loop to iterate over each element.
For every ID, it prints an command that includes the ID in the key path.
The use of "${inputlist[@]}" ensures each array element is handled safely, even if it contains spaces.
This approach is efficient for generating a series of similar commands programmatically, without reading from an external file.
#!/bin/bash
# Define the list of IDs in an array
inputlist=(
"4c6a224d-97c3-4c19-974d-0b93f18546f2"
"another-uuid-goes-here"
"and-another-one"
)
echo "--- Generating 'etcdctl get' commands ---"
# Loop through each item and PRINT the command
for i in "${inputlist[@]}"; do
echo "ETCDCTL_API=3 etcdctl get --prefix=true pwx/blaat-cluster/storage/backup/$i"
done
This Bash script reads each non-empty line from inputlist.txt and prints an etcdctl get command for each line. It first checks if the file exists; if not, it exits with an error. For every line in the file, it generates a command to fetch etcd keys with a specific prefix, using the line as part of the key path. The script only prints the commands, not executes them.
#!/bin/bash
inputlist_file="inputlist.txt"
if [ ! -f "$inputlist_file" ]; then
echo "Error: File '$inputlist_file' not found."
exit 1
fi
echo "--- Generating 'etcdctl get' commands from file '$inputlist_file' ---"
# Loop through each line and PRINT the command
while IFS= read -r i; do
if [ -z "$i" ]; then continue; fi
echo "ETCDCTL_API=3 etcdctl get --prefix=true pwx/blaat-cluster/storage/backup/$i"
done < "$inputlist_file"
For loop n times
REPETITIONS=3
for i in $(seq 1 $REPETITIONS)
do
curl https://blaataap.com
done
While loop
while true
do
curl -I -vk https://blaataap.com
sleep 1
done