今天是2014-05-27，今天遇到一个lib问题，再次记录一下。这是一个案例，更是一种解决该问题的方法过程。
当我们在使用sqlplus 登陆unix数据库的时候，有可能出现类似：xxxxxx bad ELF interpreter: No such file or directory的问题。该问题的解决办法也是lib的问题。正常情况例如以下：
[root@dg1 ~]# su - oracle
[oracle@dg1 ~]$ ldd `which sqlplus`
linux-vdso.so.1 => (0x00007fff2e5ff000)
libsqlplus.so => /u01/app/oracle/product/11.2.0/dbhome_1/lib/libsqlplus.so (0x00007fba1fef6000)
libclntsh.so.11.1 => /u01/app/oracle/product/11.2.0/dbhome_1/lib/libclntsh.so.11.1 (0x00007fba1d48b000)
libnnz11.so => /u01/app/oracle/product/11.2.0/dbhome_1/lib/libnnz11.so (0x00007fba1d0be000)
libdl.so.2 => /lib64/libdl.so.2 (0x0000003c93800000)
libm.so.6 => /lib64/libm.so.6 (0x0000003c94400000)
libpthread.so.0 => /lib64/libpthread.so.0 (0x0000003c94000000)
libnsl.so.1 => /lib64/libnsl.so.1 (0x0000003ca3000000)
libc.so.6 => /lib64/libc.so.6 (0x0000003c93c00000)
libaio.so.1 => /lib64/libaio.so.1 (0x00007fba1cea4000)
/lib64/ld-linux-x86-64.so.2 (0x0000003c93400000)
[oracle@dg1 ~]$
但有时候可能会缺失对应的lib文件。
那么对于该问题的解决思路是：
1、查看程序缺少的lib文件是那些
2、推断相应的lib文件时缺少还是环境变量问题。
3、假设是lib文件缺少那么须要安装相应的软件包或是复制相应的lib文件。假设是环境变量问题，那就须要更具不同系统设置不同的环境变量了。
另外对于oracle我们安装的32位的是lib32，是64位的那么是lib文件夹。
例如以下是我今天遇到的一个启动RealSync的样例，其它程序类似：
启动Realsync提演示样例如以下错误：
dsg@dg2 scripts]$ ./start
./start: /dsg/bin/archivelog: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory
./start: /dsg/bin/archivelog: /lib/ld-linux.so.2: bad ELF interpreter: No such file or directory
[dsg@dg2 scripts]$ ./stop
INFO: Stop realsync normally...
INFO: Stopping Vagentd ...
INFO: Stopping Loader -s for fullsync loader ...
INFO: Stopping Loader -r for realsync loader ...
[dsg@dg2 scripts]$
[dsg@dg2 scripts]$ exit
那么对于ld-linux.so.2是相应的glibc.i686这个包。因此进行安装：例如以下：
[root@dg2 ~]# cd /media/OL6.4\ x86_64\ Disc\ 1\ 20130225/Packages/
[root@dg2 Packages]# yum install glibc.i686
Loaded plugins: refresh-packagekit, security
oel6 | 3.7 kB 00:00 ...
Setting up Install Process
Resolving Dependencies
--> Running transaction check
---> Package glibc.i686 0:2.12-1.107.el6 will be installed
--> Processing Dependency: libfreebl3.so(NSSRAWHASH_3.12.3) for package: glibc-2.12-1.107.el6.i686
--> Processing Dependency: libfreebl3.so for package: glibc-2.12-1.107.el6.i686
--> Running transaction check
---> Package nss-softokn-freebl.i686 0:3.12.9-11.el6 will be installed
--> Finished Dependency Resolution Dependencies Resolved =======================================================================================================================
Package Arch Version Repository Size
=======================================================================================================================
Installing:
glibc i686 2.12-1.107.el6 oel6 4.3 M
Installing for dependencies:
nss-softokn-freebl i686 3.12.9-11.el6 oel6 116 k Transaction Summary
=======================================================================================================================
Install 2 Package(s) Total download size: 4.4 M
Installed size: 13 M
Is this ok [y/N]: y
Downloading Packages:
-----------------------------------------------------------------------------------------------------------------------
Total 60 MB/s | 4.4 MB 00:00
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Warning: RPMDB altered outside of yum.
Installing : nss-softokn-freebl-3.12.9-11.el6.i686 1/2
Installing : glibc-2.12-1.107.el6.i686 2/2
Verifying : glibc-2.12-1.107.el6.i686 1/2
Verifying : nss-softokn-freebl-3.12.9-11.el6.i686 2/2 Installed:
glibc.i686 0:2.12-1.107.el6 Dependency Installed:
nss-softokn-freebl.i686 0:3.12.9-11.el6 Complete!
[root@dg2 Packages]# su - dsg
[dsg@dg2 bin]$ cd ../ ;cd scripts/;./start
dsg 4416 4391 0 11:48 pts/0 00:00:00 /dsg/bin/archivelog /dsg/log/log.vagentd /dsg/log/archivelog/log.vagentd_archlog 43200 5G
dsg 4426 4391 0 11:48 pts/0 00:00:00 /dsg/bin/archivelog /dsg/log/log.r0 /dsg/log/archivelog/log.r0_archlog 43200 5G
[dsg@dg2 scripts]$
这是没有错误提示，查看日志例如以下：
[dsg@dg2 log]$ tail -f log.vagentd
/dsg/bin/vagentd: error while loading shared libraries: libclntsh.so.11.1: wrong ELF class: ELFCLASS64
tail: log.vagentd: file truncated
查看该程序的使用lib信息：
[dsg@dg2 scripts]$ cd ../bin
[dsg@dg2 bin]$ ldd vagentd
linux-gate.so.1 => (0xf77a6000)
libclntsh.so.11.1 => not found
libnnz.so => not found
libpthread.so.0 => /lib/libpthread.so.0 (0xf7773000)
libcrypt.so.1 => /lib/libcrypt.so.1 (0xf7743000)
libdl.so.2 => /lib/libdl.so.2 (0xf773d000)
libm.so.6 => /lib/libm.so.6 (0xf7713000)
librt.so.1 => /lib/librt.so.1 (0xf770a000)
libc.so.6 => /lib/libc.so.6 (0x48cb8000)
/lib/ld-linux.so.2 (0x48c96000)
libfreebl3.so => /lib/libfreebl3.so (0xf76bb000)
[dsg@dg2 bin]$
能够知道眼下有两个问题，一个是libnnz.so没有，还有一个是libclntsh.so.11.1没有。须要做的是安装对应的软件包或是直接复制对应的lib文件到对应文件夹。
如今须要做的事是改动环境变量
[dsg@dg2 ~]$ more .bash_profile
# .bash_profile # Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi # User specific environment and startup programs PATH=$PATH:$HOME/bin export PATH
####ORACLE#######3333
export TMP=/tmp
export TMPDIR=/tmp
export ORACLE_BASE=/u01/app/oracle
export ORACLE_SID=dg2
export ORACLE_HOME=/u01/app/oracle/product/11.2.0/dbhome_1
stty erase ^H
[dsg@dg2 ~]$ vi .bash_profile
# .bash_profile # Get the aliases and functions
if [ -f ~/.bashrc ]; then
. ~/.bashrc
fi # User specific environment and startup programs PATH=$PATH:$HOME/bin export PATH
####ORACLE#######3333
export TMP=/tmp
export TMPDIR=/tmp
export ORACLE_BASE=/u01/app/oracle
export ORACLE_SID=dg2
export ORACLE_HOME=/u01/app/oracle/product/11.2.0/dbhome_1
stty erase ^H
export LD_LIBRARY_PATH=$ORACLE_HOME/lib32:/u01/app/oracle/product/11.2.0/dbhome_1/lib32
再次查看该所需程序lib文件信息：
[dsg@dg2 bin]$ ldd vagentd
linux-gate.so.1 => (0xf77ef000)
libclntsh.so.11.1 => /u01/app/oracle/product/11.2.0/dbhome_1/lib32/libclntsh.so.11.1 (0xf5af0000)
libnnz.so => /u01/app/oracle/product/11.2.0/dbhome_1/lib32/libnnz.so (0xf58a3000)
libpthread.so.0 => /lib/libpthread.so.0 (0xf5871000)
libcrypt.so.1 => /lib/libcrypt.so.1 (0xf5840000)
libdl.so.2 => /lib/libdl.so.2 (0xf583b000)
libm.so.6 => /lib/libm.so.6 (0xf5811000)
librt.so.1 => /lib/librt.so.1 (0xf5808000)
libc.so.6 => /lib/libc.so.6 (0x48cb8000)
libnnz11.so => /u01/app/oracle/product/11.2.0/dbhome_1/lib32/libnnz11.so (0xf55ba000)
libnsl.so.1 => /lib/libnsl.so.1 (0xf559f000)
/lib/ld-linux.so.2 (0x48c96000)
libaio.so.1 => not found
libfreebl3.so => /lib/libfreebl3.so (0xf5550000)
[dsg@dg2 bin]$
那么须要安装libaio.so.1相应的软件包：
[root@dg2 Packages]# yum install libaio-
libaio-0.3.107-10.el6.i686.rpm libaio-0.3.107-10.el6.x86_64.rpm libaio-devel-0.3.107-10.el6.i686.rpm libaio-devel-0.3.107-10.el6.x86_64.rpm
[root@dg2 Packages]# yum install libaio-0.3.107-10.el6.i686.rpm
Loaded plugins: refresh-packagekit, security
Setting up Install Process
Examining libaio-0.3.107-10.el6.i686.rpm: libaio-0.3.107-10.el6.i686
Marking libaio-0.3.107-10.el6.i686.rpm to be installed
Resolving Dependencies
--> Running transaction check
---> Package libaio.i686 0:0.3.107-10.el6 will be installed
--> Finished Dependency Resolution Dependencies Resolved =======================================================================================================================================================================
Package Arch Version Repository Size
=======================================================================================================================================================================
Installing:
libaio i686 0.3.107-10.el6 /libaio-0.3.107-10.el6.i686 31 k Transaction Summary
=======================================================================================================================================================================
Install 1 Package(s) Total size: 31 k
Installed size: 31 k
Is this ok [y/N]: Y
Downloading Packages:
Running rpm_check_debug
Running Transaction Test
Transaction Test Succeeded
Running Transaction
Installing : libaio-0.3.107-10.el6.i686 1/1
Verifying : libaio-0.3.107-10.el6.i686 1/1 Installed:
libaio.i686 0:0.3.107-10.el6 Complete!
[root@dg2 Packages]#
再次查看：
[dsg@dg2 bin]$ ldd vagentd
linux-gate.so.1 => (0xf772c000)
libclntsh.so.11.1 => /u01/app/oracle/product/11.2.0/dbhome_1/lib32/libclntsh.so.11.1 (0xf5a2d000)
libnnz.so => /u01/app/oracle/product/11.2.0/dbhome_1/lib32/libnnz.so (0xf57e0000)
libpthread.so.0 => /lib/libpthread.so.0 (0xf57ae000)
libcrypt.so.1 => /lib/libcrypt.so.1 (0xf577d000)
libdl.so.2 => /lib/libdl.so.2 (0xf5778000)
libm.so.6 => /lib/libm.so.6 (0xf574e000)
librt.so.1 => /lib/librt.so.1 (0xf5745000)
libc.so.6 => /lib/libc.so.6 (0x48cb8000)
libnnz11.so => /u01/app/oracle/product/11.2.0/dbhome_1/lib32/libnnz11.so (0xf54f7000)
libnsl.so.1 => /lib/libnsl.so.1 (0xf54dc000)
libaio.so.1 => /lib/libaio.so.1 (0xf54da000)
/lib/ld-linux.so.2 (0x48c96000)
libfreebl3.so => /lib/libfreebl3.so (0xf548b000)
[dsg@dg2 bin]$
启动RealSync：
[dsg@dg2 scripts]$ ./start
dsg 5203 1 0 12:04 pts/1 00:00:00 /dsg/bin/vagentd 50001
dsg 5204 5203 0 12:04 pts/1 00:00:00 /dsg/bin/vagentd 50001
dsg 5214 1 0 12:04 pts/1 00:00:00 /dsg/bin/loader -r -qno 0 1
dsg 5216 5214 0 12:04 pts/1 00:00:00 /dsg/bin/loader -r -qno 0 1
dsg 5213 1 0 12:04 pts/1 00:00:00 /dsg/bin/loader -s -qno 0 1
dsg 5215 5213 0 12:04 pts/1 00:00:00 /dsg/bin/loader -s -qno 0 1
dsg 5199 5174 0 12:04 pts/1 00:00:00 /dsg/bin/archivelog /dsg/log/log.vagentd /dsg/log/archivelog/log.vagentd_archlog 43200 5G
dsg 5208 5174 0 12:04 pts/1 00:00:00 /dsg/bin/archivelog /dsg/log/log.r0 /dsg/log/archivelog/log.r0_archlog 43200 5G
[dsg@dg2 scripts]$
至此问题得到解决：