Questions tagged [truncate]
The truncate tag has no summary.
21 questions
4
votes
2
answers
573
views
What is the "at most" modifier for in 'truncate'?
The manual of truncate shows I can add < for "at most".
What is this for?
It sounds like the default to me.
- 30.6k
-1
votes
1
answer
163
views
Truncate command not creating a hole
I am trying to create a file with hole using the truncate command. I read up in some posts and one of the answers in this post says to use truncate command. Filesystem used is btrfs. This is the ...
0
votes
1
answer
615
views
Problem creating a disk image of an SD card
I have built a custom image of Armbian with a partition size of 3.1 GB, and I am now finished working with it. It is currently written to a bootable 64 GB SD card which is using a GUID partition table ...
- 33
0
votes
0
answers
717
views
"> $logfile" does not truncate, file size goes to 0 and a second later, is back to full size [duplicate]
I have a script that writes to a logfile like this:
$ nohup myscript.sh > myscript.out 2>&1 &
when the log file gets very large, I need to truncate it like this:
> myscript.out
I ...
- 1
0
votes
1
answer
1k
views
Truncate expand doesn't seem to work
I just expanded my 1GB "homefile" which is mounted to /home/user by another GB using truncate -s +1G homefile. While it changed the size of homefile shown with df to 2GB, when mounted it is ...
- 817
2
votes
2
answers
2k
views
Truncate file that is opened in another procces
If I try truncate -s 0 log.log (:>log.log has same behavior) the displayd space on disk do become free but the size (ls -l) of file is still the same (tho du shows less). As far as I understand, it ...
- 23
29
votes
6
answers
37k
views
Is there any limit on line length when pasting to a terminal in Linux?
I am trying to send messages from kafka-console-producer.sh, which is
#!/bin/bash
if [ "x$KAFKA_HEAP_OPTS" = "x" ]; then
export KAFKA_HEAP_OPTS="-Xmx512M"
fi
exec $(...
- 3,485
1
vote
0
answers
252
views
truncate command to to safely remove Celery log files?
I my Ubuntu server that is running Python/Celery has about 9 log files totaling to 9GB space.
Is it safe to reduce the size of these files by running the following command?
truncate -s 0 *log
If not,...
- 11
1
vote
1
answer
115
views
tee pipeline and pnmtools - truncated file
This sequence of commands works OK:
pngtopnm file.png 2> /dev/null > dump1
pnmfile < dump1
stdin: PPM raw, 1920 by 1080 maxval 255
ls -l dump1
-rw-r----- 1 cmb 6220817 Sep 15 14:26 dump1
...
- 113
0
votes
0
answers
72
views
truncate linux kernel
firstly sorry for my English.
I want to truncate kernel options like Bluetooth, mouse, keyboard etc.. except for my use.
but how can I know that kernel options related to devices that I want to remove?...
- 13
-1
votes
1
answer
482
views
tail -n 10 is truncating my entire file [duplicate]
I have these 2 scripts, one is writing to the file:
#!/usr/bin/env bash
while true; do
sleep 1;
echo "$(uuidgen)" >> /tmp/cprev.stdout.log
done;
the other is reading the last 10 lines ...
- 10.9k
0
votes
1
answer
1k
views
What could cause a log file to be trunctated during writing?
In my workplace, I've inherited the responsibility of managing a web server. It's a CentOS Linux virtual machine, running on Amazon AWS EC2. Alongside serving web pages, there is a pile of scheduled ...
- 255
11
votes
9
answers
8k
views
Is it possible to truncate a file (in place, same inode) at the beginning?
It is possible to remove trailing bytes of a file without writting to a new file (> newfile) and moving it back (mv newfile file). That is done with truncate:
truncate -s -1 file
It is possible to ...
user232326
2
votes
2
answers
802
views
/usr/bin/truncate: Argument list too long
I want to use the truncate command to create a huge number of small files for testing. I tried the command with a small number of files (100) and it worked. When I changed the number to 1000000, it ...
- 2,052
4
votes
1
answer
2k
views
Difference between writing file from /dev/zero and truncate
$ timeout 1 cat /dev/zero > file1
$ wc -c file1
270422016 file1
$ du file1
264084 file1
Questions :
(1) How do 270422016 null characters come out to be 264084 bytes (i.e 258M).
$ truncate -s ...
- 4,329
0
votes
2
answers
3k
views
wget not downloading streaming mp3 correctly
I am trying to download a streaming mp3 using wget. this is my basic command:
wget http://sj128.hnux.com/sj128.mp3 -c --timeout=1 --waitretry=0 --tries=0 -O "file.mp3"
i have been doing this in a ...
1
vote
1
answer
725
views
ffmpeg truncates paths on output when there are dots involved when run on bash
If I have a path with dots in the path, for instance:
/home/user/Documents/hello/test.testing_23-24.123/test.testing_23-24.124
ffmpeg can locate the file if you pass the file's path as an argument ...
- 11
1
vote
1
answer
833
views
How to print multiple columns without truncating?
I know that pr -m -t file1 file2 will give me 2 columns like so:
file1:
a
abc
abcdefg
abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz
file2:
1
123
12345678
12345678901234567890
-
$ pr -m -t ...
- 141
0
votes
1
answer
579
views
How do I remove a directory on a remote system that has a quota?
I have an rsync.net account that has hit its quota and I'm trying to remove (rm -rf) a directory to clean up space. However all the remove commands I can think of to try (rm, truncate, find -delete, ...
- 1,204
1
vote
1
answer
619
views
What size blocks does `truncate --io-blocks` use?
What size blocks does GNU truncate --io-blocks use?
-o, --io-blocks
treat SIZE as number of IO blocks instead of bytes
512 bytes
blockdev --getbsz
blockdev --getpbsz
- 33.4k
293
votes
3
answers
478k
views
Most efficient method to empty the contents of a file
I am aware of three methods to delete all entries from a file.
They are
>filename
touch filename1
filename < /dev/null
Of these three I abuse >filename the most as that requires the least ...
- 3,764