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Read and write to a socket using only Bash
#!/bin/bash
#
# Bash must have been compiled with this ability: --enable-net-redirections
# The device files below do not actually exist.
# Use /dev/udp for UDP sockets
exec 3<>/dev/tcp/host/port
# Write to the socket as with any file descriptor
echo "Write this to the socket" >&3
# Read from the socket as with any file descriptor
cat <&3
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