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Just annotations of little "how to's", so I know I can find how to do something I've already done when I need to do it again, in case I don't remember anymore, which is not unlikely. Hopefully they can be useful to others, but I can't guarantee that it will work, or that it won't even make things worse.
Old

Not even linux can create symlinks on FAT32

Posted 11-05-2014 at 01:04 AM by the dsc (linux-related notes)

If you've only briefly dealt with NTFS on linux, you might have noticed that it's possible to create symlinks there, not like the fake "shortcuts", but actual symlinks, that linux read as such.

That may lead the naive mind to think that symlinks are a linux/OS-side feature, and that therefore linux could create symlinks on FAT32. But that's going to be proven wrong on the first attempt.

You can, however, have symlinks on non-FAT partitions pointing to a FAT...
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Views 271 Comments 0 the dsc is offline
Old

Auxiliary script to rename multiple files adding a zero-padding to them

Posted 08-19-2014 at 12:37 AM by the dsc (linux-related notes)

From this blog:

http://www.walkingrandomly.com/?p=2850


Code:
#!/bin/bash
num=`expr match "$1" '[^0-9]*\([0-9]\+\).*'`
paddednum=`printf "%03d" $num`
echo ${1/$num/$paddednum}
Usage example:

for i in *.png;do mv $i `./zeropad.sh $i`; done


Possibly there's some syntax to do just that only with the "rename" command, though.
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Views 412 Comments 0 the dsc is offline
Old

[bash] "keep trying" command, even if exits with error, for at least 10 times

Posted 08-08-2014 at 10:40 PM by the dsc (linux-related notes)
Updated 08-08-2014 at 10:42 PM by the dsc
Tags bash

A script that tries to run a given arbitrary command N times, or until it exits with success. The commented parts are aborted attempts to make it figure whether the first parameter is a number instead of a command, and that would be used as the maximum number of attempts. Something went wrong, sometime I'll try to figure it out.

Quote:
#!/bin/bash
#input="$@"
# this program is stupid. It's declared to be in public domain by its author, who whishes to remain anonymous
...
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Views 268 Comments 3 the dsc is offline
Old

Note to myself, for whenever I get an SSD...

Posted 08-06-2014 at 10:36 PM by the dsc (linux-related notes)
Tags ssd, swap

If it would still apply for future technology...

Quote:
Current good quality SSDs have built-in mechanisms to level the wear on the whole device so that their lives are maximised, but for something like Swap the inherent nature of that requirement will significantly ratchet up the number of Write cycles on any drive that hosts it, and that is still something I want to avoid on my SSD.

In reality it may not be a factor, but I'd rather spend a few dollars on more RAM to reduce
...
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Views 408 Comments 0 the dsc is offline
Old

Listing the average file size for all subfolders (+listing subfolders without ls or find)

Posted 08-03-2014 at 08:11 PM by the dsc (linux-related notes)
Updated 08-03-2014 at 09:04 PM by the dsc

A tiny "Frankenstein monster" one liner, adding a little bit from several sources/blogs/blog comments:

lsf | while read d ; do find ./"$d" -iname "*.*" -type f -printf "%k\n" | gawk '{sum += $1; n++;} END {print sum/n;}' |sed "s|$| -- $d|" ; done | sort -n

Where the first "command", "lsf" is actually a custom function:

Code:
lsf ()
{
for f in * ; do [ -d "$f" ] &&
...
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Posted in Uncategorized
Views 295 Comments 0 the dsc is offline

  



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