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Project Notes

Finding Files

Examples of various ways to find files

Notes

The find utility is quite flexible for searching a folder tree for files matching various conditions and then chaining actions if required.

Using Find

Finding files under a root matching a name:

$ find .. -name .catalog*
../finding_files/.catalog_metadata
../function_inference/.catalog_metadata
../case_statement/.catalog_metadata
../sync_folder/.catalog_metadata
../file_locks/.catalog_metadata
../parse_env_setting/.catalog_metadata
../select_menu/.catalog_metadata
../loops/.catalog_metadata
../process_lines/.catalog_metadata

With a max depth constraint:

$ find ../.. -name *catalog* -maxdepth 2
../../catalog
../../catalog/.catalog_metadata
../../catalog/catalog.json
../../_site/catalog

With a max depth and only files constraint:

$ find ../.. -name *catalog* -maxdepth 2  -type f
../../catalog/.catalog_metadata
../../catalog/catalog.json

Performing an action with each file:

$ find .. -name .catalog* -exec ls -s {} \;
8 ../finding_files/.catalog_metadata
8 ../function_inference/.catalog_metadata
8 ../case_statement/.catalog_metadata
8 ../sync_folder/.catalog_metadata
8 ../file_locks/.catalog_metadata
8 ../parse_env_setting/.catalog_metadata
8 ../select_menu/.catalog_metadata
8 ../loops/.catalog_metadata
8 ../process_lines/.catalog_metadata

With a modified time constraint:

$ find .. -name .catalog* -mtime +60 -exec ls -s {} \;
8 ../function_inference/.catalog_metadata
8 ../case_statement/.catalog_metadata
8 ../sync_folder/.catalog_metadata
8 ../file_locks/.catalog_metadata
8 ../parse_env_setting/.catalog_metadata
8 ../select_menu/.catalog_metadata
8 ../loops/.catalog_metadata
8 ../process_lines/.catalog_metadata

Sort results by size (reverse order):

$ find ../.. -name *.jpg -exec ls -s {} \; | sort -k 1 -g -r
2896 ../../security/metasploit_penetration_testing_cookbook/metasploit-framework/data/exploits/pfsense_clickjacking/background.jpg
2896 ../../_site/security/metasploit_penetration_testing_cookbook/metasploit-framework/data/exploits/pfsense_clickjacking/background.jpg
616 ../../design/programming_interactivity/book_sources/ch13/13_12/data/earthbumps.jpg
616 ../../_site/design/programming_interactivity/book_sources/ch13/13_12/data/earthbumps.jpg
304 ../../design/programming_interactivity/book_sources/ch09/0904/streetbw.jpg
304 ../../_site/design/programming_interactivity/book_sources/ch09/0904/streetbw.jpg
264 ../../design/programming_interactivity/book_sources/ch13/13_12/data/earth.jpg
264 ../../_site/design/programming_interactivity/book_sources/ch13/13_12/data/earth.jpg
216 ../../staticweb/punch/testsite/templates/banner.jpg
216 ../../staticweb/punch/testsite/output/banner.jpg
152 ../../catalog/assets/images/nav-bg.jpg
152 ../../_site/catalog/assets/images/nav-bg.jpg
120 ../../design/programming_interactivity/book_sources/ch09/0905/streetrgb.jpg
120 ../../_site/design/programming_interactivity/book_sources/ch09/0905/streetrgb.jpg
64 ../../staticweb/jekyll/gh-pages-auto/images/highlight-bg.jpg
24 ../../staticweb/jekyll/gh-pages-auto/images/header-bg.jpg
8 ../../staticweb/jekyll/gh-pages-auto/images/sidebar-bg.jpg
8 ../../staticweb/jekyll/gh-pages-auto/images/body-bg.jpg

Finding setuid/setgid Binaries

From Linux Server Hacks #11.

Binaries with setuid/setgid permission allow users to run an executable with the permissions of the executable’s owner or group respectively, and can thus be a security issue.

$ find /usr/bin -perm +6000 -type f -exec ls -ld {} \;
-r-xr-sr-x  1 root  tty  23920 Mar 28  2018 /usr/bin/write
-r-sr-xr-x  1 root  wheel  88400 Jul  4  2018 /usr/bin/top
-r-sr-xr-x  1 root  wheel  83680 Jan 24 17:50 /usr/bin/atq
-rwsr-xr-x  1 root  wheel  39216 Jul  4  2018 /usr/bin/crontab
-r-sr-xr-x  1 root  wheel  83680 Jan 24 17:50 /usr/bin/atrm
-r-sr-xr-x  1 root  wheel  52512 Jan 24 17:50 /usr/bin/newgrp
-rwsr-xr-x  1 root  wheel  25488 Jul  4  2018 /usr/bin/su
-r-sr-xr-x  1 root  wheel  83680 Jan 24 17:50 /usr/bin/batch
-r-sr-xr-x  1 root  wheel  83680 Jan 24 17:50 /usr/bin/at
-r-sr-xr-x  1 root  wheel  23568 Mar 28  2018 /usr/bin/quota
-r-s--x--x  1 root  wheel  438656 Jan 24 17:50 /usr/bin/sudo
-r-sr-xr-x  1 root  wheel  76288 Jan 24 17:50 /usr/bin/login

Credits and References

About LCK#120 bash
Project Source on GitHub Return to the Project Catalog

This page is a web-friendly rendering of my project notes shared in the LittleCodingKata GitHub repository.

LittleCodingKata is my collection of programming exercises, research and code toys broadly spanning things that relate to programming and software development (languages, frameworks and tools).

These range from the trivial to the complex and serious. Many are inspired by existing work and I'll note credits and references where applicable. The focus is quite scattered, as I variously work on things new and important in the moment, or go back to revisit things from the past.

This is primarily a personal collection for my own edification and learning, but anyone who stumbles by is welcome to borrow, steal or reference the work here. And if you spot errors or issues I'd really appreciate some feedback - create an issue, send me an email or even send a pull-request.