Posts Tagged ‘loop command’

Find largest files on AIX system root / show biggest files and directories in AIX folder howto

Friday, November 6th, 2020


On an AIX server if you get a root directory ( / ) to be completely full problem and the AIX running services are unable to write their pid files and logs for example in /tmp /admin /home /var/tmp /var/log/ and rest of directory structure or the system is almost full with mounted filesystems which shows it is 90% or 95%+ full on main partition,  the system is either already stuck or it is on the way to stop functiononing normally. Hence the only way to recover IBM AIX machine to a normal behavior is to clean up some files (if you can't extend the partition) or add more physical Hard drive, just as we usually do on Linux.

So How can we clean up largest files on AIX?

Lets say we want to find all files on AIX larger than 1 MB.

aix-system:/ $ find / -xdev -size 2048 -ls | sort -r +6
12579 1400 -rw-r—–  1 root      security   1433534 Jun 26  2019 /etc/security/tsd/tsd.dat
 9325 20361 -rw-r—–  1 root      system    20848752 Nov  6 16:02 /etc/security/failedlogin
21862 7105 -rwxr-xr-x  1 root      system     7274915 Aug 24  2017 /sbin/zabbix_agentd
   72 7005 -rw-rw—-  1 root      system     7172962 Nov  6 16:19 /audit/stream.out
24726 2810 -rw——-  1 root      system     2876944 Feb 29  2012 /etc/syslog-ng/core
29314 2391 -r-xr-xr-x  1 root      system     2447454 Jun 25  2019 /lpp/bos/bos.rte.filesystem/
21844 2391 -r-xr-xr-x  1 root      system     2447414 Jun 25  2019 /sbin/helpers/jfs2/logredo64
21843 2219 -r-xr-xr-x  1 root      system     2271971 Jun 25  2019 /sbin/helpers/jfs2/logredo
29313 2218 -r-xr-xr-x  1 root      system     2270835 Jun 25  2019 /lpp/bos/bos.rte.filesystem/
22279 1800 -rw-r–r–  1 root      system     1843200 Nov  4 08:03 /root/smit.log
12577 1399 -rw-r–r–  1 root      system     1431685 Jun 26  2019 /etc/security/tsd/.tsd.bk
21837 1325 -r-xr-xr-x  1 root      system     1356340 Jun 25  2019 /sbin/helpers/jfs2/fsck64
29307 1325 -r-xr-xr-x  1 root      system     1356196 Jun 25  2019 /lpp/bos/bos.rte.filesystem/
   12 1262 -rw——-  1 root      system     1291365 Aug  8  2011 /core


Above finds all files greater than 1 MB and sort them in reverse
order with the largest files first.

To search all files larger than 64 Megabytes under root ( / )

aix-system:/ $ find / -xdev -size +131072 -ls | sort -r +6
65139 97019 -rw-r–r–  1 root      system    99347181 Mar 31  2017 /admin/

Display 10 largest directories on system

aix-system:/ $ du -a /dir | sort -n -r | head -10

Show biggest files and directories in a directory


aix-system:/ $ du -sk * | sort -n
4       Mail
4       liste
4       my_user
4       syslog-ng.conf
140     smit.script
180     smit.transaction
1804    smit.log

Below du display the size of all files and directories in the current directory with the biggest being at the bottom.


List all largest files in dir decrasingly. If a directory is matches show all sub-dirs largest files.

aix-system:/ $ ls -A . | while read name; do du -sk $name; done | sort -nr

Below ls + while loop command sorts disk usage for all files in the current directory by size, in decreasing order. If the file we suspect happens to be a directory, we can then change into that directory, and re-run the preceding command to determine what is taking up space within that directory.

Continue these steps until you find the desired file or files, at which point you can take appropriate actions.

If the bottom-most item is a directory, then cd into that directory and run the du command again. Keep drilling down until you find the biggest files on your system and get rid of them to save some space.

How to mount ISO image files in Graphical Environment (GUI) on Ubuntu and Debian GNU/Linux

Saturday, January 14th, 2012

Mounting ISO files in Linux is easy with mount cmd, however remembering the exact command one has to issue is a hard task because mounting ISO files is not a common task.

Mounting ISO files directly by clicking on the ISO file is very nice, especially for lazy people uninitiated with the command line 😉

Besides that I'm sure many Windows users are curious if there is an equivallent program to DaemonTools for Linux / BSD*?

The answer to this question is YES!
There are two major programs which can be used as a DaemonTools substitute on Linux:

These are FuriousISOMount and AcetoneISO
AcetoneISO is more known and I've used it some long time ago and if I'm correct it used to be one of the first ISO Mount GUI programs for Linux. There is a project called GMount-ISO / (GMountISO) which of the time of writting this article seems to be dead (at least I couldn't find the source code).

Luckily FuriousISOMount and AcetoneISO are pretty easy to install and either one of the two is nowdays existing in most Linux distributions.
Probably the programs can also be easily run on BSD platform also quite easily using bsd linux emulation.
If someone has tried something to mount GUIs in Free/Net/OpenBSD, I'll be interesting to hear how?

1. Mount ISO files GUI in GNOME with Furius ISO Mount

FuriousISOMount is a simple Gtk+ interface to mount -t iso9660 -o loop command.

To start using the program on Debian / Ubuntu install with apt;

debian:~# apt-get install furiusisomount
The following extra packages will be installed:
fuseiso fuseiso9660 libumlib0
The following NEW packages will be installed:
furiusisomount fuseiso fuseiso9660 libumlib0

To access the program in GNOME after install use;

Applications -> Accessories -> Furious ISO Mount

Screenshot ISO Mount Tool Debian GNU/Linux Screenshot

When mounting it is important to choose Loop option to mount the iso instead of Fuse

After the program is installed to associate the (.iso) ISO files, to permanently be opened with furiusisomount roll over the .iso file and choose Open With -> Other Application -> (Use a custom command) -> furiusisomount

GNOME Open with menu Debian GNU / Linux

2. Mount ISO Files in KDE Graphical Environment with AcetoneISO

AcetoneISO is build on top of KDE's QT library and isway more feature rich than furiousisomount.
Installing AcetoneISO Ubuntu and Debian is done with:

debian:~# apt-get install acetoneiso
The following NEW packages will be installed:
acetoneiso gnupg-agent gnupg2 libksba8 pinentry-gtk2 pinentry-qt4
0 upgraded, 6 newly installed, 0 to remove and 35 not upgraded.
Need to get 3,963 kB of archives.
After this operation, 8,974 kB of additional disk space will be used.

Screenshot Furius ISO Mount Tool Debian GNU/Linux ScreenShot

AcetoneISO supports:

  • conversion between different ISO formats
  • burn images to disc
  • split ISO image volumes
  • encrypt images
  • extract password protected files

Complete list of the rich functionality AcetoneISO offers is to be found on
To start the program via the GNOME menus use;

Applications -> Accessories -> Sound & Video -> AcetoneISO

I personally don't like AcetoneISO as I'm not a KDE user and I see the functionality this program offers as to rich and mostly unnecessery for the simple purpose of mounting an ISO.

3. Mount ISO image files using the mount command

If you're a console guy and still prefer mounting ISO with the mount command instead of using fancy gui stuff use:

# mount -t iso9660 -o loop /home/binary/someiso.iso /home/username/Iso_Directory_Name