How to implement scheduled backup and incremental backup of uploaded files in Linux

yum -y install vixie-cron
yum -y install crontabs

systemctl start crond.service //Start commandsystemctl status crond.service //Check statussystemctl stop crond.service //Shutdown commandsystemctl restart crond.service //Restartsystemctl enable crond.service //Start and run

service crond start //Start the service service crond stop //Shut down the service service crond restart //Restart the service service crond reload //Reload the configuration service crond status //Check the crontab service status

#!/bin/bash
#Good practice#Rename the script according to the project #For example amountebak.sh or pandawillsbak.sh
#This script is best placed in the absolute path part defined by $bakpp. #You can find the corresponding backup file under $bakpp. #For example, /usr/backup/amountebak.sh or /usr/backup/pandawillsbak.sh


########## Init Path ########
# The parameters that must be defined in the following parameters are $bakpp, $project, $projectpp
TAR=/bin/tar
# The place to store backup files, distinguished by project name bakpp=/data/file_backup/"$project"
# The folder to be backed up, the folder path project=file
projectpp=/data/
# parameter for variable
ym=`date +%Y%m`
ymd=`date +%Y%m%d`
# The subdirectory for storing backup files is divided by month. Its parent directory is monthbakpp=$bakpp/$ym defined by $bakpp
gidpp=$monthbakpp
gidshot=gid$project$ym
# Full backup file name fullname=$ym
#Incremental backup file name incrementalname=$ymd
# Record the location of the log
log=$bakpp/$project.log

############# chk_full #######################
# check if fullbackup exists, if not create it #this function check fullbackup file exist or not , if not then create fullbackup now

chk_full()
{
if [ -e "$monthbakpp"/"$project"_"$ym"_full.tar.gz ];then
echo ""$project"_"$ym"_full.tar.gz file exist!! ====`date +%Y-%m-%d-%T` " >>$log
else
tar_full
fi
}
######### chk_incremental ########
# Check if incremental backup exists chk_incremental()
{
while [ -e "$monthbakpp"/"$project"_"$incrementalname"_incremental.tar.gz ]
do
incrementalname=`echo "$incrementalname + 0.1" | bc `
done
}
######## tar_incremental #######
# Perform an incremental backup tar_incremental()
{
cd $projectpp
echo "BEIGIN_TIME=====`date +%Y-%m-%d-%T` ==== CREATE "$project"_"$incrementalname"_incremental.tar.gz" >> $log
sleep 3
$TAR -g $gidpp/$gidshot -zcf $monthbakpp/"$project"_"$incrementalname"_incremental.tar.gz $project
echo "END_TIME========`date +%Y-%m-%d-%T` ==== CREATE "$project"_"$incrementalname"_incremental.tar.gz" >> $log
}

######## tar_full ###########
tar_full()
{
touch $gidpp/$gidshot
cd $projectpp
echo "BEIGIN_TIME=====`date +%Y-%m-%d-%T` ==== CREATE "$project"_"$fullname"_full.tar.gz" >> $log
$TAR -g $gidpp/$gidshot -zcf $monthbakpp/"$project"_"$fullname"_full.tar.gz $project
echo "END_TIME========`date +%Y-%m-%d-%T` ==== CREATE "$project"_"$fullname"_full.tar.gz" >> $log
}

########### backup #############################
# Overall call for backup, at this time, appropriate checks will be made to ensure that the backup prerequisites are fully prepared backup()
{
if [ -d $monthbakpp ]; then
 chk_full
 chk_incremental
 tar_incremental
else
mkdir -p $bakpp/$ym
tar_full
fi
}

########### let's begin #############
# First check if $bakpp exists, if not create it and then back it up if [ -d $bakpp ]; then
backup
else
mkdir -p $bakpp
backup
fi
#advice you can create a file for put backup file, e.g. /usr/cctcc
#crontab
#mini hours day month week command
# */5 * * * * /home/mmroot/zbb/aaa.sh
# 0 1 */1 * * /home/mmroot/zbb/aaa.sh
# tar -ztf test.tar.gz View the files in the backup file