DB2安装成功后，创建实例
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[root@test instance]# ./db2icrt -u db2fenc1 db2inst1
tail: cannot open `+2' for reading: No such file or directory
lcount = 0
DBI1069E Unexpected error. Function = chk_fsystype, Return code =
22.
Explanation:
An unexpected error occurred during the execution of this
program.
User Response:
If the problem persists, contact IBM Support with the following
information:
o Message number
o Function name
o Return code
o Problem description
DBI1079I Output is saved in the log file /tmp/db2icrt.log.30249.
Explanation:
All processed and failed operations have been saved into this log
file.
User Response:
Do not modify this file in any way. This file is for IBM
Technical Support reference.
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以上显示无法创建实例，好你是tail的问题。经查是POSIX兼容的问题，解决方法：
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[root@test instance]# export _POSIX2_VERSION=199209
[root@test instance]# ./db2icrt -u db2fenc1 db2inst1
DBI1070I Program db2icrt completed successfully.
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创建成功。
主要是由于系统使用的是新版本的POSIX，导致执行tail +2命令时，不是像老版本的POSIX下，tail +2命令显示的是从文件第2行显结尾，而是把‘+2’当成一个文件，所以显示无法找到‘+2’文件。通常我们只要按照上面的方法，在终端改变一下POSIX版本号就可以了。
关于linux gnu实用工具兼容性问题，可以参考以下：
在此记录一下这个问题，可以让遇到同样问题的朋友参考，也可以给自己留个底
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