Bash Script to download backup from a remote server using CRON and SCP while keeping limited copies.

## Server Setup
# SSH commands for creating user and download upload directories

groupadd backupusers
useradd -g backupusers -s /sbin/nologin backupuser
mkdir -p /SystemAdmin/BackupStorage/{upload,download}
chown backupuser:backupusers /SystemAdmin/BackupStorage/{upload,download}
chown root:root /SystemAdmin/BackupStorage
chmod 755 /SystemAdmin/BackupStorage

echo "
Match User backupuser
	SSHFile /SystemAdmin/SSH/BackupUser
	ForceCommand internal-sftp
	PasswordAuthentication no
	ChrootDirectory /SystemAdmin/BackupStorage
	PermitTunnel no
	AllowAgentForwarding no
	AllowTcpForwarding no
	X11Forwarding no
" >> /etc/ssh/sshd_config

# Paste your generated SSH key below
mkdir -p /SystemAdmin/SSH
cat > /SystemAdmin/SSH/BackupUser << EOF
ssh-ed25519 yourlongsshkeygoeshere BackupUser
EOF

chmod 0600 /SystemAdmin/SSH/BackupUser
chown -R backupuser:backupusers /SystemAdmin/SSH/BackupUser
systemctl restart sshd

#!/bin/bash

date=$(date '+%Y-%m-%d %H:%M:%S')
logger -t SystemAdmin -p warning "Zip Backup Job Start"
wdir="/var/www"
backup_dir="/SystemAdmin/BackupStorage/download"
backupfilename="${backup_dir}/Backup.zip"
if [ -e $backupfilename ]
then
rm "$backupfilename"
fi
find "$wdir" -type f '(' -name '*.db' -o -name '*.php' -o -name '*.ini' ')' -exec zip -r "$backupfilename" {} +
echo "Archive created on $date" | zip -z $backupfilename
logger -t SystemAdmin -p warning "Zip Backup Job End"
exit 0

#!/bin/bash

FILENAME_PREFIX="/root/Downloads/Server1Weekly"
FILENAME_EXTENSION="zip"
NUM_COPIES_TO_KEEP=4
# Do not use name with any space or special characters
SCRIPT_NAME="[RemoteServer1]"
NL="\n"
LOCKFILE="/var/tmp/${SCRIPT_NAME}Weekly.lock"

TIMESTAMP=$(date +%Y-%m-%d_%H-%M-%S)
NEW_FILENAME="${FILENAME_PREFIX}_${TIMESTAMP}.${FILENAME_EXTENSION}"

scp -o ConnectTimeout=30 -o BatchMode=yes -o StrictHostKeyChecking=accept-new -i /pathtosshkey/id_ed25519_BackupUser backupuser@www.remoteserver1.com:/download/Backup.zip ${NEW_FILENAME}
if [ $? -eq 0 ]; then
logger -t SystemAdmin -p warning "${SCRIPT_NAME} Download successful"
log_message+="${NL}${SCRIPT_NAME} Download successful"
logger -t SystemAdmin -p warning "${SCRIPT_NAME} Downloading backup to ${NEW_FILENAME}"
log_message="${SCRIPT_NAME} Downloading backup to ${NEW_FILENAME}"
logger -t SystemAdmin -p warning "${SCRIPT_NAME} Managing old copies"
log_message+="${NL}${SCRIPT_NAME} Managing old copies"
OLD_FILES_TO_DELETE=$(ls -tr "${FILENAME_PREFIX}_"*".${FILENAME_EXTENSION}" | head -n -"${NUM_COPIES_TO_KEEP}")
if [ -n "$OLD_FILES_TO_DELETE" ]; then
logger -t SystemAdmin -p warning "${SCRIPT_NAME} Deleting old copies"
log_message+="${NL}${SCRIPT_NAME} Deleting old copies"
echo "$OLD_FILES_TO_DELETE" | while read -r file; do
logger -t SystemAdmin -p warning "${SCRIPT_NAME} Deleting: $file"
rm "$file"
echo "$file">>"/var/tmp/deleteoldfiles${SCRIPT_NAME}Weekly.txt"
done
IFS=$'\n'
for line in $(cat "/var/tmp/deleteoldfiles${SCRIPT_NAME}Weekly.txt"); do
log_message+="${NL}${SCRIPT_NAME} $line Deleted"
done
rm "/var/tmp/deleteoldfiles${SCRIPT_NAME}Weekly.txt"
else
logger -t SystemAdmin -p warning "${SCRIPT_NAME} No old copies to delete or fewer than ${NUM_COPIES_TO_KEEP} copies present"
log_message+="${NL}${SCRIPT_NAME} No old copies to delete or fewer than ${NUM_COPIES_TO_KEEP} copies present"
fi
if [ -e $LOCKFILE ]
then
rm $LOCKFILE
fi
else
logger -t SystemAdmin -p warning "${SCRIPT_NAME} Download failed"
log_message+="${NL}${SCRIPT_NAME} Download failed"
touch $LOCKFILE
fi
# Notification API if you need one
#generate_post_data()
#{
#cat <<EOF
#{
#"token": "password",
#"title": "$SCRIPT_NAME Backup",
#"message": "$log_message"
#}
#EOF
#}
#curl -i -H "Accept: application/json" -H "Content-Type:application/json" -X POST --data "$(generate_post_data)" "http://example.com/notification-json.php"
exit 0

#!/bin/bash

FILENAME_PREFIX_WEEKLY="/root/Downloads/Server1Weekly"
FILENAME_PREFIX="/root/Downloads/Server1Monthly"
FILENAME_EXTENSION="zip"
NUM_COPIES_TO_KEEP=12
# Do not use name with any space or special characters
SCRIPT_NAME="[RemoteServer1]"
NL="\n"

TIMESTAMP=$(date +%Y-%m-%d_%H-%M-%S)
LOCKFILE="/var/tmp/${SCRIPT_NAME}Weekly.lock"
if [ -e $LOCKFILE ]
then
	logger -t SystemAdmin -p warning "${SCRIPT_NAME} Monthly copy failed because of lock file"
	echo "ERROR: Monthly copy failed because of lock file"
	log_message+="${NL}${SCRIPT_NAME} Monthly copy failed because of lock file"
else

NEW_FILENAME="${FILENAME_PREFIX}_${TIMESTAMP}.${FILENAME_EXTENSION}"

LATEST_FILE_TO_COPY=$(ls -t "${FILENAME_PREFIX_WEEKLY}_"*".${FILENAME_EXTENSION}" | head -n 1)
if [ -n "$LATEST_FILE_TO_COPY" ]; then
cp "$LATEST_FILE_TO_COPY" ${NEW_FILENAME}
if [ $? -eq 0 ]; then
logger -t SystemAdmin -p warning "${SCRIPT_NAME} Monthly copy successful"
log_message+="${NL}${SCRIPT_NAME} Monthly copy successful"
logger -t SystemAdmin -p warning "${SCRIPT_NAME} Monthly backup to ${NEW_FILENAME}"
log_message="${SCRIPT_NAME} Monthly backup to ${NEW_FILENAME}"
logger -t SystemAdmin -p warning "${SCRIPT_NAME} Managing old monthly copies"
log_message+="${NL}${SCRIPT_NAME} Managing old monthly copies"
OLD_FILES_TO_DELETE=$(ls -tr "${FILENAME_PREFIX}_"*".${FILENAME_EXTENSION}" | head -n -"${NUM_COPIES_TO_KEEP}")
if [ -n "$OLD_FILES_TO_DELETE" ]; then
logger -t SystemAdmin -p warning "${SCRIPT_NAME} Deleting old monthly copies"
log_message+="${NL}${SCRIPT_NAME} Deleting old monthly copies"
echo "$OLD_FILES_TO_DELETE" | while read -r file; do
logger -t SystemAdmin -p warning "${SCRIPT_NAME} Deleting: $file"
rm "$file"
echo "$file">>"/var/tmp/deleteoldfiles${SCRIPT_NAME}Monthly.txt"
done
IFS=$'\n'
for line in $(cat "/var/tmp/deleteoldfiles${SCRIPT_NAME}Monthly.txt"); do
log_message+="${NL}${SCRIPT_NAME} $line Deleted"
done
rm "/var/tmp/deleteoldfiles${SCRIPT_NAME}Monthly.txt"
else
logger -t SystemAdmin -p warning "${SCRIPT_NAME} No old copies to delete or fewer than ${NUM_COPIES_TO_KEEP} monthly copies present"
log_message+="${NL}${SCRIPT_NAME} No old copies to delete or fewer than ${NUM_COPIES_TO_KEEP} monthly copies present"
fi
else
logger -t SystemAdmin -p warning "${SCRIPT_NAME} Monthly copy failed"
log_message+="${NL}${SCRIPT_NAME} Monthly copy failed"
fi
else
logger -t SystemAdmin -p warning "${SCRIPT_NAME} Error: Monthly copy failed, file does not exist or is inaccessible."
log_message+="${NL}${SCRIPT_NAME} Error: Monthly copy failed, file does not exist or is inaccessible."
echo "${SCRIPT_NAME} Error: Monthly copy failed, file does not exist or is inaccessible."
fi

# Notification API if you need one
#generate_post_data()
#{
#cat <<EOF
#{
#"token": "password",
#"title": "$SCRIPT_NAME Backup",
#"message": "$log_message"
#}
#EOF
#}
#curl -i -H "Accept: application/json" -H "Content-Type:application/json" -X POST --data "$(generate_post_data)" "http://example.com/notification-json.php"

fi
exit 0