Search notes:

/lib64/ld-linux-x86-64.so.2

/usr/bin/ld.so as a symbolic link to /lib64/ld-linux-x86-64.so.2 which in turn is a symbolic link to /lib/x86_64-linux-gnu/ld-linux-x86-64.so.2:
$ namei /usr/bin/ld.so | grep '^ *l' | sed 's/^ *l //'
ld.so -> /lib64/ld-linux-x86-64.so.2
lib64 -> usr/lib64
ld-linux-x86-64.so.2 -> /lib/x86_64-linux-gnu/ld-linux-x86-64.so.2
lib -> usr/lib

TODO

.interp

The name of the dynamic linker is stored in the .interp section of an executable:
$ readelf -p .interp /usr/bin/ls

String dump of section '.interp':
  [     0]  /lib64/ld-linux-x86-64.so.2
$ objdump -s -j .interp /usr/bin/ls

/usr/bin/ls:     file format elf64-x86-64

Contents of section .interp:
 0318 2f6c6962 36342f6c 642d6c69 6e75782d  /lib64/ld-linux-
 0328 7838362d 36342e73 6f2e3200           x86-64.so.2.    

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/Linux/fh...', 1758207814, '216.73.216.150', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/Linux/fhs/lib64/ld-linux-x86-64_so_2(57): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78