用于从 ftp 删除旧文件的 Linux shell 脚本 [英] Linux shell script for delete old files from ftp

问题描述

有一个问题 - 需要将数据库备份存储在 FTP 上.在 FTP 上备份不应该超过 10 个，即在你添加备份到 FTP 之后，应该删除最旧的文件，使文件总数不能超过 10 个.我们怎样才能从 ftp 中实现这样的删除呢?我正在尝试编写脚本，但无法删除:

There is a problem - need to store the database backup on the FTP. On the FTP should not be more than 10 back-ups, ie, After you add backup to FTP should be removed, the oldest files to make the total number of files can not exceed 10 pieces. How can we implement such a removal from the ftp? I'm trying to write a script, but does not work delete:

x=1
ftp -vn $FTP_SERVER<<!
user $FTP_LOGIN $FTP_PASSWORD
binary
put $DUMP_FILE_NAME

for i in `ls -t` do
    if [ $x -le $keep ] then
        ((x++))
        continue
    fi
    delete $i
done

bye
EOF
</i>

推荐答案

这是我编写的一个脚本，用于删除远程 ftp 站点上超过 7 天的所有文件.它的工作原理是检索目录列表，解析修改日期，然后重新连接以删除任何早于 ndays 的文件.

This is a script I wrote to remove any files on a remote ftp site older than 7 days. It works by retrieving a listing of the directory, parsing the modified date, and then re-connecting to delete any files older than ndays.

我怀疑硬编码到循环中的数字(元素日期)可能会根据您的系统设置而改变.ls 命令的返回格式取决于本地系统设置.

I suspect that the numbers hard-coded into the loop (element date) may change depending on the setup of your system. The return formatting of the ls command is dependent on the local system settings.

假设您每天都进行备份，那么将 ndays 设置为 10 可能会解决您的问题.

Assuming your backups are every day, then setting ndays to 10 might solve your problem.

#!/bin/bash
# get a list of files and dates from ftp and remove files older than ndays
ftpsite="ftp.yourserver.com"
ftpuser="loginusername"
ftppass="password"
putdir="/public_ftp/admin/logs"

ndays=7


# work out our cutoff date
MM=`date --date="$ndays days ago" +%b`
DD=`date --date="$ndays days ago" +%d`


echo removing files older than $MM $DD

# get directory listing from remote source
listing=`ftp -i -n $ftpsite <<EOMYF 
user $ftpuser $ftppass
binary
cd $putdir
ls
quit
EOMYF
`
lista=( $listing )

# loop over our files
for ((FNO=0; FNO<${#lista[@]}; FNO+=9));do
  # month (element 5), day (element 6) and filename (element 8)
  #echo Date ${lista[`expr $FNO+5`]} ${lista[`expr $FNO+6`]}          File: ${lista[`expr $FNO+8`]}

  # check the date stamp
  if [ ${lista[`expr $FNO+5`]}=$MM ];
  then
    if [[ ${lista[`expr $FNO+6`]} -lt $DD ]];
    then
      # Remove this file
      echo "Removing ${lista[`expr $FNO+8`]}"
      ftp -i -n $ftpsite <<EOMYF2 
      user $ftpuser $ftppass
      binary
      cd $putdir
      delete ${lista[`expr $FNO+8`]}
      quit
EOMYF2


    fi
  fi
done

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