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Cybersecurity Triage

Read-only, can be slow

Find Upload Files Writable Outside the Owner

You need to find uploaded files that group or other users can still modify.

Command

find /srv/www/example/shared/uploads -type f -perm /0022 -printf '%M %u:%g %p\n' 2>/dev/null | sort

Before you run this

System impact: Read-only. Can create load on large logs, directories, filesystems, or process tables.

When not to use it: Do not assume every group-writable upload is wrong without checking the service group model.

Expected output

Upload files with group-write or other-write permission bits.

System impact

Read-only, can be slow. Nothing changes. The command reports files writable by group or other.

Scope this to the smallest useful path or service on busy systems.

Recovery / rollback: no state is changed.

When to use it

Use when reviewing upload directories, generated exports, shared cache files, or restored media.

When not to use it

Do not assume every group-writable upload is wrong without checking the service group model.

next steps

Related commands

Cybersecurity Triage Can be slow

Find Writable Directories Missing the Sticky Bit

A writable log directory is not the same thing as a safe shared directory.

find /srv/www/example -type d -perm -0002 ! -perm -1000 -printf '%m %u:%g %p\n' 2>/dev/null | sort
Hosting Operations Can be slow

Find Runtime Directories Writable Outside the Owner

Runtime directories often need writes, but the write boundary should be visible.

find /srv/www/example/shared/storage /srv/www/example/shared/uploads -type d -perm /0022 -printf '%M %u:%g %p\n' 2>/dev/null | sort
Cybersecurity Triage Can be slow

Find Config Files with Execute Bits

Config files do not usually need to be executable.

find /srv/www/example -type f -perm /111 \( -path '*/config/*' -o -name '*.env' -o -name '*.conf' \) -printf '%M %u:%g %p\n' 2>/dev/null | sort
Cybersecurity Triage Sensitive output

Find World-Readable Secret-Looking Files

The fastest secret audit starts with readable files that look like secrets.

find /srv/www/example -type f -perm -0004 \( -iname '*secret*' -o -iname '*.env' -o -iname '*token*' -o -iname '*key*' \) -printf '%M %u:%g %p\n' 2>/dev/null | sort
Hosting Operations Can be slow

Find Release Files Writable Outside the Owner

A release file that someone besides the owner can modify deserves a second look.

find /srv/www/example/releases/current -type f -perm /0022 -printf '%M %u:%g %p\n' 2>/dev/null | sort
Study mapping

Use this as independent command practice: read the notes, predict the output, then compare it with the example before using a real shell.

  • LPIC-1 style command-line practice
  • LFCS style performance-task practice
  • Linux+ style troubleshooting review

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