Finding and Removing Old or Inactive Files

Part of the job of cleaning up heavily loaded file systems involves locating and removing files that have not been used recently. You can locate unused files by using the ls or find commands. For more information, see the ls(1) and find(1) man pages.

Other ways to conserve disk space include emptying temporary directories such as the directories located in /var/tmp or /var/spool, and deleting core and crash dump files. For more information about crash dump files, refer to Chapter 17, Managing System Crash Information (Tasks).

How to List the Newest Files

List files, displaying the most recently created or changed files first, by using the ls -t command.
```
$ ls -t [directory]
```
-t

Sorts files by latest time stamp first.

directory

Identifies the directory that you want to search.

Example 13-9 Listing the Newest Files

The following example shows how to use the ls -tl command to locate the most recently created or changed files within the /var/adm directory. The sulog file was created or edited most recently.

$ ls -tl /var/adm
-rw-r--r--   1 root     root     3227516 Jan  7 12:22 messages
-rw-r--r--   1 adm      adm        12648 Jan  7 06:45 wtmpx
-r--r--r--   1 root     root     3353420 Jan  7 06:45 lastlog
drwxrwxr-x   9 root     sys           15 Jan  4 03:10 .
-rw-r--r--   1 root     root       56045 Jan  3 19:10 messages.0
drwxr-xr-x  41 root     sys           42 Jan  3 19:03 ..
lrwxrwxrwx   1 root     root          27 Jan  3 17:36 utmpx -> ../../system/volatile/utmpx
-rw-------   1 uucp     bin            0 Jan  3 17:34 aculog
drwxr-xr-x   2 root     sys            2 Jan  3 17:26 streams
drwxr-xr-x   2 root     sys            2 Jan  3 17:26 sm.bin
drwxrwxr-x   2 adm      sys            2 Jan  3 17:26 sa
drwxr-xr-x   2 root     sys            2 Jan  3 17:26 pool
drwxr-xr-x   2 adm      adm            2 Jan  3 17:26 log
drwxr-xr-x   2 adm      adm            2 Jan  3 17:26 exacct
drwxrwxr-x   5 adm      adm            5 Jan  3 17:26 acct

How to Find and Remove Old or Inactive Files

Become an administrator.
For more information, see How to Obtain Administrative Rights in Oracle Solaris Administration: Security Services.
Find files that have not been accessed for a specified number of days and list them in a file.
```
# find directory -type f[-atime +nnn] [-mtime +nnn] -print > filename &
```
directory

Identifies the directory you want to search. Directories below this directory are also searched.

-atime +nnn

Finds files that have not been accessed within the number of days (nnn) that you specify.

-mtime +nnn

Finds files that have not been modified within the number of days (nnn) that you specify.

filename

Identifies the file that contains the list of inactive files.
Remove the inactive files found listed in the previous step.
```
# rm `cat filename`
```
where filename identifies the file that was created in the previous step. This file contains the list of inactive files.

Example 13-10 Finding and Removing Old or Inactive Files

The following example shows files in the /var/adm directory and the subdirectories that have not been accessed in the last 60 days. The /var/tmp/deadfiles file contains the list of inactive files. The rm command removes these inactive files.

# find /var/adm -type f -atime +60 -print > /var/tmp/deadfiles &
# more /var/tmp/deadfiles
/var/adm/aculog
/var/adm/spellhist
/var/adm/wtmpx
/var/adm/sa/sa13
/var/adm/sa/sa27
/var/adm/sa/sa11
/var/adm/sa/sa23
/var/adm/sulog
/var/adm/vold.log
/var/adm/messages.1
/var/adm/messages.2
/var/adm/messages.3
# rm `cat /var/tmp/deadfiles`
#

How to Clear Out Temporary Directories

Become an administrator.
For more information, see How to Obtain Administrative Rights in Oracle Solaris Administration: Security Services.
Change to the directory that you want to clean out.
```
# cd directory
```
Caution - Ensure that you are in the correct directory before completing Step 3. Step 3 deletes all files in the current directory.
Delete the files and subdirectories in the current directory.
```
# rm -r *
```
Change to other directories that contain unnecessary, temporary or obsolete subdirectories and files.
Delete these subdirectories and files by repeating Step 3.

Example 13-11 Clearing Out Temporary Directories

The following example shows how to clear out the mywork directory, and how to verify that all files and subdirectories were removed.

# cd mywork
# ls
filea.000
fileb.000
filec.001
# rm -r *
# ls
#

How to Find and Delete `core` Files

Become an administrator.
Change to the directory where you want to search for core files.
Find and remove any core files in this directory and its subdirectories.
```
# find . -name core -exec rm {} \;
```

Example 13-12 Finding and Deleting core Files

The following example shows how to find and remove core files from the jones user account by using the find command.

# cd /home/jones
# find . -name core -exec rm {} \;

How to Delete Crash Dump Files

Crash dump files can be very large. If you have enabled your system to store these files, do not retain them for longer than necessary.

Become an administrator.
Change to the directory where crash dump files are stored.
```
# cd /var/crash/
```
Caution - Ensure you are in the correct directory before completing Step 3. Step 3 deletes all files in the current directory.
Remove the crash dump files.
```
# rm *
```
Verify that the crash dump files were removed.
```
# ls
```

Example 13-13 Deleting Crash Dump Files

The following example shows how to remove crash dump files from the system venus, and how to verify that the crash dump files were removed.

# cd /var/crash
# rm *
# ls

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