Linked Questions

1
vote
0answers
2k views

Log files corrupted with NUL characters and text from other processes [duplicate]

I am running Wind River Linux 4.3 on an embedded Freescale single board computer (SBC). Output from uname -a: Linux ge101 2.6.34.10-myname-grsec-WR4.3.0.0_cgl #1 SMP PREEMPT Mon Aug 26 01:35:35 PDT ...
0
votes
1answer
967 views

/var/log/messages contains series of ^@ char [duplicate]

I am running kernel 4.1.15, sometimes in /var/log/messages i am getting series of ^@ characters. Normally the content is ok in /var/log/messages it is just for once for few seconds i got these junk ...
1
vote
0answers
40 views

Ubuntu server halted with binary zeros (^@^@^@^@^@… as text) in syslog a kern.log [duplicate]

My server stopped working (inaccessible through network) without any reason. Traffic was normal before it happened, circa 20MBit/s, after restart everything was OK and server was running as usually. ...
7
votes
2answers
2k views

cat shows nothing

My team is working on a CI environment. A ko file, named x.ko, is always generated from the CI environment at a regular time everyday and its type is ELF 64-bit LSB relocatable. Today, I found that ...
2
votes
1answer
1k views

What does ^@^@^@ mean in a text file?

Sometimes I have problems with opening a file using a graphical text editor -- I'm using geany. The file can be read by vim without a problem. I checked the file, and there wasn't anything wrong with ...
4
votes
0answers
2k views

How to figure out why Linux crashes

Every so often, my laptop will crash. The screen will freeze, including the cursor, the lock lights (caps lock and the like) will turn off if they were on, though my battery, power, and wifi lights ...
6
votes
0answers
957 views

NUL entry in syslog? [closed]

My servers went down on the 30th. It just came back online today. At first I thought it was the router because the router the server is connected to is a bit squirrely but when I checked syslog I have ...
1
vote
0answers
324 views

Linux freeze on shutdown problem

I'm trying to throubleshoot an annoying shutdown problem with my Sun Ultra 24 Workstation running under Devuan ASCII. groucho@devuan:~$ inxi -b System: Host: devuan Kernel: 4.9.0-8-amd64 x86_64 (...
1
vote
0answers
114 views

Ubuntu is freezing - why and what does this symbol mean ^@?

Jul 3 15:58:01 nusik-ryzen CRON[8641]: (root) CMD (pgrep xmr-stak> /dev/null || cd /xmr-stak && ./xmr-stak) Jul 3 15:58:01 nusik-ryzen CRON[8642]: (root) CMD (pgrep xmrig> /dev/null || /...
0
votes
0answers
44 views

Characters like @ at shutdown

On the linux distros I use, debian and fedora, and on the laptops I have, when I shutdown, I see @ or sometimes other characters, on the console (next to normal sector clean /dev/xxx message) and I ...