ImageMagick:报错：error while loading shared libraries: libjpeg.so.9(ImageMagick 7.1/rocky linux 9.2)

一，报错的例子:

1,报错信息

[root@localhost work]# identify -list format
identify: error while loading shared libraries: libjpeg.so.9: cannot open shared object file: No such file or directory

2，原因:

imagemagick在调用jpeg的动态链接库时找不到相应的文件，所以报错

3,查看libjpeg:通常放在/usr/local/lib/

[root@localhost work]# ls /usr/local/lib/libjpeg.so*
/usr/local/lib/libjpeg.so  /usr/local/lib/libjpeg.so.9  /usr/local/lib/libjpeg.so.9.5.0

二，解决办法一：临时解决:

[root@localhost work]# ldconfig /usr/local/lib

再次执行identify命令可以正常执行

[root@localhost work]# identify -list format
   Format  Mode  Description
...

说明：刘宏缔的架构森林—专注it技术的博客，
网站：https://blog.imgtouch.com
原文: https://blog.imgtouch.com/index.php/2023/07/12/imagemagick-bao-cuo-error-while-loading-shared-libraries-libjpeg-so-9-imagemagick-7-1-rocky-linux-9/
代码: https://github.com/liuhongdi/ 或 https://gitee.com/liuhongdi
说明：作者:刘宏缔 邮箱: 371125307@qq.com

三，解决办法二：永久解决:保存库的路径

在/etc/ld.so.conf.d/目录下新建一个lib.conf文件，
添加libjpeg库所在的目录/usr/local/lib到文件中

[root@localhost etc]# cd /etc/ld.so.conf.d/
[root@localhost ld.so.conf.d]# pwd
/etc/ld.so.conf.d
[root@localhost ld.so.conf.d]# vi lib.conf
[root@localhost ld.so.conf.d]# more lib.conf
/usr/local/lib

添加完成后使生效:

[root@localhost ld.so.conf.d]# ldconfig -v
ldconfig: 无法对 /libx32 进行 stat 操作: 没有那个文件或目录
ldconfig: 多次给出路径“/usr/lib”
(from <builtin>:0 and <builtin>:0)
ldconfig: 多次给出路径“/usr/lib64”
(from <builtin>:0 and <builtin>:0)
ldconfig: 无法对 /usr/libx32 进行 stat 操作: 没有那个文件或目录
/usr/local/lib: (from /etc/ld.so.conf.d/lib.conf:1)
    libtiffxx.so.6 -> libtiffxx.so.6.0.1
    libtiff.so.6 -> libtiff.so.6.0.1
    libjpeg.so.9 -> libjpeg.so.9.5.0
    libwebpdemux.so.2 -> libwebpdemux.so.2.0.13
    libwebpmux.so.3 -> libwebpmux.so.3.0.12
    libwebp.so.7 -> libwebp.so.7.1.7
    libsharpyuv.so.0 -> libsharpyuv.so.0.0.1
...

四，查看linux的版本:

[root@localhost ImageMagick-7.1.1-12]# cat /etc/redhat-release
Rocky Linux release 9.2 (Blue Onyx)