xtrabackup和innobackupex version问题，version参数不可用

innobackupex和xtrabackup从help里都有--version查看版本的功能

[root@lzl ~]# innobackupex --help|grep version
xtrabackup: recognized server arguments: --datadir=/data/mysql --log_bin=master-bin --server-id=1001
as published by the Free Software Foundation version 2
-v, --version print xtrabackup version information
--no-version-check This option disables the version check which is enabled
by the --version-check option.
Percona Server 5.0-series versions, specify the LSN as
[root@lzl ~]# xtrabackup --help|grep version
xtrabackup: recognized server arguments: --datadir=/data/mysql --log_bin=master-bin --server-id=1001
xtrabackup: recognized client arguments:
xtrabackup version 2.4.20 based on MySQL server 5.7.26 Linux (x86_64) (revision id: c8b4056)
as published by the Free Software Foundation version 2
-v, --version print xtrabackup version information
--no-version-check This option disables the version check which is enabled
by the --version-check option.
--tls-version=name TLS version to use, permitted values are: TLSv1, TLSv1.1,
--redo-log-version=#
Redo log version of the backup. For --prepare only.
redo-log-version 1
version FALSE
no-version-check FALSE
tls-version TLSv1,TLSv1.1,TLSv1.2

但是都无法使用

[root@lzl ~]# innobackupex --version
xtrabackup: recognized server arguments: --datadir=/data/mysql --log_bin=master-bin --server-id=1001
innobackupex version 2.4.20 Linux (x86_64) (revision id: c8b4056)
[root@lzl ~]# xtrabackup --version
xtrabackup: recognized server arguments: --datadir=/data/mysql --log_bin=master-bin --server-id=1001
xtrabackup version 2.4.20 based on MySQL server 5.7.26 Linux (x86_64) (revision id: c8b4056)

可以通过xtrabackup --help里前面的输出信息查看版本号
[root@lzl ~]# innobackupex --help|head -20
xtrabackup: recognized server arguments: --datadir=/data/mysql --log_bin=master-bin --server-id=1001
Open source backup tool for InnoDB and XtraDB

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation version 2
of the License.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You can download full text of the license on http://www.gnu.org/licenses/gpl-2.0.txt

innobackupex - Non-blocking backup tool for InnoDB, XtraDB and HailDB databases

[root@lzl ~]# xtrabackup --help|head -20
xtrabackup: recognized server arguments: --datadir=/data/mysql --log_bin=master-bin --server-id=1001
xtrabackup: recognized client arguments:
xtrabackup version 2.4.20 based on MySQL server 5.7.26 Linux (x86_64) (revision id: c8b4056)
Open source backup tool for InnoDB and XtraDB

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation version 2
of the License.

You can download full text of the license on http://www.gnu.org/licenses/gpl-2.0.txt

Usage: [xtrabackup [--defaults-file=#] --backup | xtrabackup [--defaults-file=#] --prepare] [OPTIONS]

Default options are read from the following files in the given order:

xtrabackup和innobackupex version问题，version参数不可用

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