案例環(huán)境：

操作系統(tǒng)版本： Red Hat Enterprise Linux Server release 5.7 64bit

數(shù)據(jù)庫版本 ： 5.6.19 MySQL Community Server

AutoMySQLBackup： Automysqlbackup-v3.0_rc6

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案例場景：

AutoMySQLBackup 3.0版本備份時(shí)，出現(xiàn)告警錯誤“du: WARNING: use --si, not -H; the meaning of the -H option will soon change to be the same as that of --dereference-args (-D)” 具體信息請見下面：

?==============================================================================Total disk space used for backup storage...Size - Location1.8M /u01/db_backup/mysqlbackup/?==============================================================================?###### WARNING ######Errors reported during AutoMySQLBackup execution.. Backup failedError log below..du: WARNING: use --si, not -H; the meaning of the -H option will soonchange to be the same as that of --dereference-args (-D)?================================== End of Backup ===========================================================================================================

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出現(xiàn)這個(gè)錯誤是因?yàn)樵?Red Hat Enterprise Linux 5.7上的du命令不符合POSIX標(biāo)準(zhǔn)規(guī)范。具體參考官方的AutoMySQLBackup 3.0 warning on du in Centos (5.7)

The POSIX specifications are. It seems, that the Centos 5.7 version of du is not POSIX compliant, but will soon be. I have done my best to use only POSIX compliant syntax to assure the bug-free running on most systems. Unfortunately, I can't take care of every system and distribution, which chooses to defy POSIX syntax. For other people and myself, it would be a good idea to get the options of du on Centos 5.7, so please post 'du --help'.

如下所示，在命令du --help中，你就能從幫助信息中看到下面信息：

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可以通過修改腳本/usr/local/bin/automysqlbackup 找到下面腳本，修改腳本將“ echo `du -hsH "${CONFIG_backup_dir}"` 修改為 echo `du -hs "${CONFIG_backup_dir}"` 即可解決問題。

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在Red Hat Enterprise Linux Server release 6.6 就不會有這個(gè)問題，它的du版本為8.4， Red Hat Enterprise Linux 5.7上的du命令版本為du (GNU coreutils) 5.97

# du --versiondu (GNU coreutils) 8.4Copyright (C) 2010 Free Software Foundation, Inc.License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.This is free software: you are free to change and redistribute it.There is NO WARRANTY, to the extent permitted by law.?Written by Torbj?rn Granlund, David MacKenzie, Paul Eggert,and Jim Meyering.

參考資料：

http://sourceforge.net/p/automysqlbackup/bugs/54/

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