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1. UNIX for Advanced & Expert Users
Dear members, moderators and others.
While working on <insert project>, a need has surfaced to watch a directory, and when a file comes, to do appropriate action.
So, i started writing some shell code, aware of linux inotify-tools package with inotifywait.
Also, i'm seeing a lot of similar... (1 Reply)
Discussion started by: Peasant
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2. SuSE
SUSE Linux 11 and 10 SP3.
I am trying to capture some of my activities in SYSLOG file, /var/log/messages.
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3. UNIX for Advanced & Expert Users
Hello All,
I have below file system IN_CLOSE_WRITE event defined in my incrontab file, however it looks like the events kick off earlier even before the file transmission is complete and kicks off the shell script with partial file (file.xml.filepart) and causing issues. Is there any way i can... (4 Replies)
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4. UNIX for Advanced & Expert Users
ofIn a big Unix environment you likely install cron jobs like this on a thousand systems:
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If the cron job accesses a shared... (2 Replies)
Discussion started by: MadeInGermany
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5. UNIX for Advanced & Expert Users
A well established form of application cron jobs look like this:
39 15 * * * && /usr/local/monitoring/oracle/check_dbs.sh >/dev/null 2>&1The repetition makes it a long line, hard to read, hard to maintain.
I suggest the following instead:
39 15 * * * { /usr/local/monitoring/oracle/check_dbs.sh... (1 Reply)
Discussion started by: MadeInGermany
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6. Solaris
Greetings to all.
I need help from the experts. I have been given a FTP server script that runs all day, looking for files that are FTP'd to our machines. Its hoaky I know, but there are times that files are sent but somehow get lost. Is there a logfile I can view to see when files are received?
... (1 Reply)
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7. Shell Programming and Scripting
I need my for loop to do 2 things at a time. I have a script where I move the old files into archive directory and then i want to compress them. Presently I am using 2 for loops for it. How can i do it in 1 for loop.
Code:
after this i am compresing them in another for loop: (3 Replies)
Discussion started by: dsravan
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8. Shell Programming and Scripting
hi,
i need help writing shell scripts to define patterns of user activities on our apache.
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9. UNIX for Advanced & Expert Users
Hi!! Experts,
I have a typical scenario here in which several users have access to a particular login .. say "build".
None of the users know the passwd for this login.
The name of some of the user have been to .rhosts file.
The users can connect only by doing a rlogin to this id and then... (4 Replies)
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10. UNIX for Advanced & Expert Users
I am responsible for administering 6 Tru64UX servers.
I need to keep an eye on all the commands executed by all the users.
Is there a way where I can save the commands executed in a seperate folder and then keep checking the list every now and then.
How can do it ? (5 Replies)
Discussion started by: shauche
5 Replies
FSTRIM(8) System Administration FSTRIM(8)
NAME
fstrim - discard unused blocks on a mounted filesystem
SYNOPSIS
fstrim [-o offset] [-l length] [-m minimum-free-extent] [-v] mountpoint
DESCRIPTION
fstrim is used on a mounted filesystem to discard (or "trim") blocks which are not in use by the filesystem. This is useful for solid-
state drives (SSDs) and thinly-provisioned storage.
By default, fstrim will discard all unused blocks in the filesystem. Options may be used to modify this behavior based on range or size,
as explained below.
The mountpoint argument is the pathname of the directory where the filesystem is mounted.
OPTIONS
The offset, length, and minimum-free-extent arguments may be followed by binary (2^N) suffixes KiB, MiB, GiB, TiB, PiB and EiB (the "iB" is
optional, e.g. "K" has the same meaning as "KiB") or decimal (10^N) suffixes KB, MB, GB, PB and EB.
-h, --help
Print help and exit.
-o, --offset offset
Byte offset in filesystem from which to begin searching for free blocks to discard. Default value is zero, starting at the begin-
ning of the filesystem.
-l, --length length
Number of bytes after starting point to search for free blocks to discard. If the specified value extends past the end of the
filesystem, fstrim will stop at the filesystem size boundary. Default value extends to the end of the filesystem.
-m, --minimum minimum-free-extent
Minimum contiguous free range to discard, in bytes. (This value is internally rounded up to a multiple of the filesystem block
size). Free ranges smaller than this will be ignored. By increasing this value, the fstrim operation will complete more quickly
for filesystems with badly fragmented freespace, although not all blocks will be discarded. Default value is zero, discard every
free block.
-v, --verbose
Verbose execution. When specified fstrim will output the number of bytes passed from the filesystem down the block stack to the
device for potential discard. This number is a maximum discard amount from the storage device's perspective, because FITRIM ioctl
called repeated will keep sending the same sectors for discard repeatedly.
fstrim will report the same potential discard bytes each time, but only sectors which had been written to between the discards would
actually be discarded by the storage device. Further, the kernel block layer reserves the right to adjust the discard ranges to fit
raid stripe geometry, non-trim capable devices in a LVM setup, etc. These reductions would not be reflected in fstrim_range.len
(the --length option).
AUTHOR
Lukas Czerner <lczerner@redhat.com>
Karel Zak <kzak@redhat.com>
SEE ALSO
mount(8)
AVAILABILITY
The fstrim command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
util-linux November 2010 FSTRIM(8)