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Ubuntu 16.04 tar 备份带有进度条 PV（管道查看器）不起作用

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Ubuntu 16.04 tar 备份带有进度条 PV（管道查看器）不起作用

我正在尝试创建一个 Bash 脚本，每周备份一次主文件夹中的重要文件。我还没有开始 crontab 部分，但我一直在尝试让这个进度条工作。我想知道要等多久才能完成。我不想只输入 echo 。"Process ongoing, please wait"请帮忙

Bash 代码：

TODAY=$(date +%d-%m-%Y)
echo $TODAY
file="Exist_or_Not.txt"
type pv > $file
if grep -q "pv" $file; then
    echo "exists"
else
    echo "Installing pv for progress bar"
    sudo apt install pv
fi
#SIZE='du -sk /home/user/{Desktop,Documents,Downloads} | cut -f 1'
sudo tar -pczf /media/backups/backup${TODAY}.tar.gz /home/user/Desktop /home/user/Documents /home/user/Downloads | pv -s 40978228k > /dev/null

我通过计算 Python 中 $SIZE 的值得到了 40978228k。将这些数字相加，num1 + num 2 + num3，因为${SIZE}k没有用。它一直说pv: -s: integer argument expected

答案1

编辑：完整代码，有效！

#!/bin/bash

TODAY=$(date +%d-%m-%Y)
f="tekst.txt"
type pv > $f
if grep -q "pv" $f; then
    echo "PV exists"
else
    echo "Installing PV..."
    sudo apt install pv
fi
f2="home_backup${TODAY}.tar.gz"
echo "Your username is: $(whoami)"
echo "1) Backup your home directory"
echo "2) Extract your backup"
read -p "Choose the option: " choice
if [ -z $choice ]; then
    echo "Choose the option"
    continue
elif [ $choice -eq 1 ]; then
    echo "Backup directory: /media/backup/"
    sleep 1
    echo "Backup Process Activated"
    sudo tar -cf - /home/$(whoami) -P | pv -s $(du -sb /home/$(whoami) | awk '{print $1}') | gzip > /media/extracted/$f2
elif [ $choice -eq 2 ]; then
    echo "Extracting your backupped home directory from /media/backup/"
    echo "Extracted directories go to /media/extracted/"
    sleep 1
    echo "Extraction Process Activated"
    pv /media/extracted/$f2 | sudo tar -xzf - -C /media/extracted/
fi

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