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df command shows zero memory for / directory - it boots and works for many things

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http://forums.fedoraforum.org – The df command shows the / directory with zero memory available. The system boots, I can open files etc. mysqld will not start because of too little memory. httpd will start. free -m shows memory available. This happened once before and it corrected itself. I then removed a bunch of files not needed. I'm trying to copy important files to cdrom. The cp command tells me it can't write to cd, because it's read only. The cd disk itself says CD RW the mount command used by itself shows that partition as read write (rw). Could it be telling me read only because it sees no memory avai (HowTos)

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Submitted by nicelinux on 12/12/2012 – Made popular on 12/12/2012

Stories similar to df command shows zero memory for / directory - it boots and works for many things

help me understanding my memory 2 years 28 weeks ago

look at both attached files.

They show the output of TOP command and WEBMIN system status

I cant understand it? webmin says i have enough memory, TOP says im low...

[ubuntu] Memory Usage tools 15 weeks 1 day ago

Hi,

I'm using the command "top" to see how much memory the system is using (ram). Now, when I go to the desktop and run the system monitor tool that comes by default with the OS, it shows lot less memory usage then "top".

Top shows I'm using 1.7GB memory while the system monitor tool shows I'm using 560MB...

After installation System monitor shows that memory usage is over 500 MB - pure system after start.

There are no processes which use more 20 MB of memory. Other versions of Ubuntu used about 200 MB. I'm using 64bit version. Intel i7, 16 GB of memory.

What's going on? What process are eating my memory?

We have a java application where towards the last part of the codes we wrote these lines

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$ sudo cat /proc/[0-9]*/maps | cut -c82- | sort | uniq -c | sort -n

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Used memory in Linux? 34 weeks 4 days ago

I see in System Monitor, used memory only 332MB, so free memory is ~3.4GB, but when I use command line: free -m, used memory is 1GB, free memory only 2.8GB.

I use command line: cat /proc/meminfo -> result same free -m.

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AIX Memory & DISK IO 1 year 12 weeks ago

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I'm doing some raw socket scripting in C. Everything works fine.

However, I monitored the memory using top, and it shows that the memory used by my script is increasing over time.

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