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nginx/1.28.0

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Linux 6.8.0-90-generic

PHP Version:

8.4.15

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alqudsvolunteers

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/home/alqudsvolunteers/rootlink/usr/share/doc/bpftrace/examples

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✏️ Editing: execsnoop_example.txt

Demonstrations of execsnoop, the Linux BPF/bpftrace version.

Tracing all new process execution (via exec()):

# ./execsnoop.bt
Attaching 3 probes...
TIME            PID     PPID    ARGS
08:57:52.430193 3187374 1971701 ls --color --color=auto -lh execsnoop.bt execsnoop.bt.0 execsnoop.bt.1
08:57:52.441868 3187378 3187375 man ls
08:57:52.473565 3187384 3187378 preconv -e UTF-8
08:57:52.473620 3187384 3187378 preconv -e UTF-8
08:57:52.473658 3187384 3187378 preconv -e UTF-8
08:57:52.473839 3187385 3187378 tbl
08:57:52.473897 3187385 3187378 tbl
08:57:52.473944 3187385 3187378 tbl
08:57:52.474055 3187386 3187378 nroff -mandoc -Tutf8
08:57:52.474107 3187386 3187378 nroff -mandoc -Tutf8
08:57:52.474145 3187386 3187378 nroff -mandoc -Tutf8
08:57:52.474684 3187388 3187378 less
08:57:52.474739 3187388 3187378 less
08:57:52.474780 3187388 3187378 less
08:57:52.475502 3187389 3187386 groff -Tutf8 -mtty-char -mandoc
08:57:52.476717 3187390 3187389 troff -mtty-char -mandoc -Tutf8
08:57:52.476811 3187391 3187389 grotty

The output begins by showing an "ls" command, and then the process execution
to serve "man ls". The same exec arguments appear multiple times: in this case
they are failing as the $PATH variable is walked, until one finally succeeds.

This tool can be used to discover unwanted short-lived processes that may be
causing performance issues such as latency perturbations.

There is another version of this tool in bcc: https://github.com/iovisor/bcc
The bcc version provides more fields and command line options.

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