Prelink: /usr/lib/ (...) not /lib64/ (...) as dynamic linker

[N0625]

Fala, galera!!

 

Recentemente lembrei da existência das otimizações de desempenho providas pelo Prelink, Preload e Zram-Config, configurações essas que já tinha usado no passado. Só que ao ativar o prelink no Ubuntu 18.04 me retorna a saída abaixo:

 

Citação

sysadmin@udesk1804:~$ sudo su
[sudo] senha para sysadmin: 
root@udesk1804:/home/sysadmin# prelink -amR
prelink: /usr/bin/ubuntu-report: section file offsets not monotonically increasing
prelink: /usr/lib/klibc/bin/minips: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/mount: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/losetup: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/reboot: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/sync: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/mknod: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/chroot: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/halt: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/umount: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/kill: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/run-init: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/nuke: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/mkfifo: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/ipconfig: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/pivot_root: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/resume: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/readlink: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/kinit.shared: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/false: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/fstype: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/cat: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/dmesg: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/poweroff: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/nfsmount: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/mkdir: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/ls: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/sh.shared: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/sleep: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/true: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/dd: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/ln: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/mv: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/cpio: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/klibc/bin/uname: Using /lib/klibc-wBFLvVtxy4xJqEadIBJMa78iJz8.so, not /lib64/ld-linux-x86-64.so.2 as dynamic linker
prelink: /usr/lib/gcc/x86_64-linux-gnu/7/lto1: COPY relocations don't point into .bss or .sbss section
prelink: /usr/lib/gcc/x86_64-linux-gnu/7/cc1plus: COPY relocations don't point into .bss or .sbss section
prelink: /usr/lib/gcc/x86_64-linux-gnu/7/cc1: COPY relocations don't point into .bss or .sbss section
root@udesk1804:/home/sysadmin# 

 

Eu lembro das outras vezes que ao rodar o comando prelink -amR da primeira vez ele rolava uma listagem pura, sem o "Using...". O que necessariamente as linhas acima querem dizer?

[Marcos FRM]

Não ajudarei muito , mas recomendo não rodar esse programa. Por ser bastante invasivo e estar no repositório universe (não recebe a devida atenção dos funcionários da Canonical), acho que não vale o risco por provavelmente pouco ganho.