按计划运行 bash 脚本
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Run bash script on schedule
提问by Sebastian Bia?ek
I have some problem with bash script. I need to add some content to it. My script need to run at a certain time but I don't know how to do that. It should work like this: I have a variable then I assign a time like 3200s. When I run the program, then the script will create backups every 3200s but only if some files changed. What am I doing wrong?
我对 bash 脚本有一些问题。我需要添加一些内容。我的脚本需要在某个时间运行，但我不知道该怎么做。它应该是这样工作的：我有一个变量，然后我分配一个像 3200s 这样的时间。当我运行程序时，脚本将每 3200 秒创建一次备份，但前提是某些文件发生更改。我究竟做错了什么？
!/bin/bash
SOURCE="/var/www/my_web/load/"
BACKUP="/home/your_user/load/"
LBACKUP="/home/your_user/load/latest-full/"
DATE=$(date +%Y-%m-%d-%T)
DESTINATION="$BACKUP"/"$DATE"-diff/
rsync -av --compare-dest="$LBACKUP" "$SOURCE" "$DESTINATION"
cd "$DESTINATION"
find . -depth -type d -empty -delete
采纳答案by webb
here i have added that feature to your script:
在这里，我已将该功能添加到您的脚本中：
usage:
用法：
./yourscript.sh 3200
script:
脚本：
#!/bin/bash
# make sure you gave a number of seconds:
[ 0 -gt 0 ] || exit
while true; do
SOURCE="/var/www/my_web/load/"
BACKUP="/home/your_user/load/"
LBACKUP="/home/your_user/load/latest-full/"
DATE=$(date +%Y-%m-%d-%T)
DESTINATION="$BACKUP"/"$DATE"-diff/
rsync -av --compare-dest="$LBACKUP" "$SOURCE" "$DESTINATION"
cd "$DESTINATION"
find . -depth -type d -empty -delete
sleep
done
if you get an error like bash: ./yourscript.sh: Permission denied, then you need to do this once: chmod +x yourscript.shto make the script executable.
如果您收到类似 的错误bash: ./yourscript.sh: Permission denied，那么您需要执行一次：chmod +x yourscript.sh使脚本可执行。
to continue running in background even after you leave the terminal window:
即使在您离开终端窗口后继续在后台运行：
nohup ./yourscript.sh 3200 &
to run in background on schedule even after restart:
即使在重新启动后也按计划在后台运行：
use cron, e.g., Using crontab to execute script every minute and another every 24 hours
使用cron，例如，使用 crontab 每分钟执行一次脚本，每 24 小时执行一次
