Did you know SD-WANs can improve network connectivity? Check out this webinar to learn how an SD-WAN simplified, one-click tool can help you migrate and manage data in the cloud.
Course Of The Month
7 days, 1 hour left to enrollBecome a Premium Member and unlock a new, free course in leading technologies each month.
Solved
AIX lost+found directory Issue
Posted on 2014-04-01
I have created a filesystem on AIX as root called /opt/orautils, Now I changed the permissions on the orautils to oracle:dba, there is a lost_found directory in /opt/orautils with root:system permissions, What does this mean and can I change it to oracle:dba
[X]
Welcome to Experts Exchange
Add your voice to the tech community where 5M+ people just like you are talking about what matters.
- Help others & share knowledge
- Earn cash & points
- Learn & ask questions
3-
2
5 Comments
Active today
lost+found is created automatically during filesystem initialization.
It is the place where "fsck" ("file system check") puts orphaned files which you
can try to recover manually (maybe only in part) after an fsck run if required.
The fsck command reconnects any orphaned files and directories by placing
them in the lost+found directory with an assigned i-node number.
Leave it as is, it doesn't hurt anybody because it's usually empty.
If you accidentally deleted such a directory you can recreate it by means of the "mklost+found" utility.
It is the place where "fsck" ("file system check") puts orphaned files which you
can try to recover manually (maybe only in part) after an fsck run if required.
The fsck command reconnects any orphaned files and directories by placing
them in the lost+found directory with an assigned i-node number.
Leave it as is, it doesn't hurt anybody because it's usually empty.
If you accidentally deleted such a directory you can recreate it by means of the "mklost+found" utility.
does it effect if the permissions are changed to oracle:dba, As all the files in the directory belong to oracle:dba.
Active today
Since fsck has to be run by root the ownership shouldn't really matter.
I'd suggest changing it back to "root:system" with permissions "700" ("drwx------") nonetheless so only root can view the contents (a security measure).
I'd suggest changing it back to "root:system" with permissions "700" ("drwx------") nonetheless so only root can view the contents (a security measure).
can u please explain with an example on what files are placed in lost+found and how they can be recovered
Active today
Orphaned files/directories are those whose inode is not referenced in any directory.
fsck puts them into lost+found, assigning a name consisting of a "#" followed by some random numbers.
You can run the "file" command against these items to find out what kind of data might be contained.
For text files ("ASCII text"): You can simply open them in an editor to check the content.
For directories: You can run "ls -l" against them. The files and subdirectories inside should still have their original names.
For other files like binaries ("executable"): Run the "strings" command against them, maybe the file contains a hint on its identity and content. There's probably not much more you can do, however.
Thanks for the points!
fsck puts them into lost+found, assigning a name consisting of a "#" followed by some random numbers.
You can run the "file" command against these items to find out what kind of data might be contained.
For text files ("ASCII text"): You can simply open them in an editor to check the content.
For directories: You can run "ls -l" against them. The files and subdirectories inside should still have their original names.
For other files like binaries ("executable"): Run the "strings" command against them, maybe the file contains a hint on its identity and content. There's probably not much more you can do, however.
Thanks for the points!
Featured Post
Question has a verified solution.
If you are experiencing a similar issue, please ask a related question
A metadevice consists of one or more devices (slices). It can be expanded by adding slices. Then, it can be grown to fill a larger space while the file system is in use.
However, not all UNIX file systems (UFS) can be expanded this way. The conca…
Using libpcap/Jpcap to capture and send packets on Solaris version (10/11)
Library used:
1. Libpcap (http://www.tcpdump.org) Version 1.2
2. Jpcap(http://netresearch.ics.uci.edu/kfujii/Jpcap/doc/index.html) Version 0.6
Prerequisite:
1. GCC …
Learn how to find files with the shell using the find and locate commands.
Use locate to find a needle in a haystack.: With locate, check if the file still exists.: Use find to get the actual location of the file.:
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.
Suggested Courses
Course of the Month7 days, 1 hour left to enroll
726 members asked questions and received personalized solutions in the past 7 days.
Join the community of 500,000 technology professionals and ask your questions.