Test network speed via scp

speed_test.sh

#!/bin/bash
# author: Firxiao

TEST_FILE=/root/test_file
LOG_FILE=/opt/speed_test.log
DEST_SERVER=xxxx
DEST_LOCATION='/tmp'
LOCAL_LOCATION='/tmp'

# Function: Setup LOG_FILE and redirect stdout/stderr.
log_setup() {
     # Check if LOG_FILE exists and is writable.
     ( [ -e "$LOG_FILE" ] || touch "$LOG_FILE" ) && [ ! -w "$LOG_FILE" ] && echo "ERROR: Cannot write to $LOG_FILE. Check permissions or sudo access." && exit 1

     tmplog=$(tail -n $LOG_FILE_max_lines $LOG_FILE 2>/dev/null) && echo "${tmplog}" > $LOG_FILE
     exec >  >(tee -a $LOG_FILE)
     exec 2>&1
 }
log_setup
 # Function: Log an event.
log() {
     echo "[$(date +"%Y-%m-%d"+"%T")]: $*"
 }

TEST_FILE_NAME=$(/usr/bin/basename $TEST_FILE)
UPLOAD_SPEED=$(/usr/bin/script -q -c "scp $TEST_FILE $DEST_SERVER:$DEST_LOCATION"|grep $TEST_FILE_NAME|awk '{print $(NF-2),"\t",$(NF-1),"\t",$NF}')
DOWNLOAD_SPEED=$(/usr/bin/script -q -c "scp $DEST_SERVER:$DEST_LOCATION/$TEST_FILE_NAME $LOCAL_LOCATION"|grep $TEST_FILE_NAME|awk '{print $(NF-2),"\t",$(NF-1),"\t",$NF}')

log "upload $UPLOAD_SPEED"
log "download $DOWNLOAD_SPEED"