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Questions tagged [proc]

The proc filesystem in Unix-like operating systems presents information about processes and other system information. Typically, it is mapped to a mount point named /proc at boot time.

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Where is the /proc folder on Mac OS X?

I am reading a book that speaks about Bash in Linux systems. But I am a Mac OS X user and I cant find /proc folder in my machine. Where I can see the Mac OS X terminal equivalent of the /proc folder?
sensorario
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How does /proc/* work?

There are many files in /proc, like /proc/cpuinfo, /proc/meminfo, /proc/devices and so on, which, when opened, return system information. These files do not seem to have any existence in reality, as running file on them only tells that they're…
test
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cat /proc/meminfo what do all those numbers mean

In reading the man page on the free command in Linux. I found that is gets its info from /proc/meminfo. I understand a few of the entries, like MemTotal and MemFree. What do the rest mean. cat /proc/meminfo MemTotal: 3973736 kB MemFree: …
nelaaro
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What is the true meaning of the unit `kB` in `/proc/meminfo`?

I am freshly installing a distribution and want to set up a swap partition so that it is compatible with hibernate. First, I must determine the amount of physical memory the system has. $ grep MemTotal /proc/meminfo MemTotal: 38740876 kB Now as…
Jacob Birkett
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How can I get the number of threads running in a process from /proc/[pid]/stat in Linux?

I have the pid of the process. I would like to know the current number of thread running in the process. I know I can read /proc/pid/stat for this information, but I'm not sure how to specifically get the number of threads from stat. Can anyone…
Irlanco
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Bash: permission denied for file write

I followed this tutorial guide on "How to Create Linux Proc Files in C Program using LKM". I've successfully made my module and loaded it in. Now I want to echo to my proc file to make sure the method gets called that's supposed to be called. I…
Sam
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Why do symbolic links in /proc/$PID/fd/ act as hard links?

When the target of a symbolic link is deleted, it points to nothing and there's no way to get to the content of the deleted target. Files in /proc/$PID/fd/ are displayed as symbolic links, but they allow you to get to the deleted target's content,…
user300811
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Permission denied when setting values in sysctl on Ubuntu 12.04

I am trying to configure my Ubuntu 12.04 VPS (OpenVZ) to reboot when it runs out of memory. To do this I have added following lines to my "/etc/sysctl.conf" file. vm.panic_on_oom = 1 kernel.panic = 14 But when I run the configuration using the…
Jay Bhatt
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What is the policy for permissions on /proc//environ?

I see, that usual user process gets user-readable permissions: -r-------- 1 1000 1000 0 Nov 19 13:51 /proc/9083/environ but f.ex. SCREEN daemon gets root ownership: -r-------- 1 root root 0 Nov 19 13:47 /proc/9167/environ Though, 9167 is also user…
midenok
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/proc/cpuinfo doesn't show CPU frequency at all

/proc/cpuinfo doesn't show CPU frequency at all. I built the kernel on my own. Did I miss some kernel configuration? pi@raspberrypi ~ $ cat /proc/cpuinfo processor : 0 model name : ARMv6-compatible processor rev 7 (v6l) Features : swp half…
Younggun Kim
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What is "ln -L" (--logical) for?

I can read in the ln man page: -L, --logical make hard links to symbolic link references I read somewhere that ln -L could be used to re-link files that were deleted but which are still open, using the /proc filesystem. For example: ln…
user36520
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What do the different /proc/bus/pci/0x directories represent?

What do the different /proc/bus/pci/0x directories represent? Do they represent the different PCI/PCI-E sockets on a board? If I have one mini pci and 2 PCI-E sockets on my board, should I be seeing 3 different '0x' directories under…
freethinker
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What is the difference between "mount -t ..." and "mount -o bind ..." with regard to chroot environment

So I am setting up a chroot where I need proc, sys and dev folders. I have read that I need to mount them as follows: mount -t proc /proc /mnt/chroot/proc mount -t sysfs /sys /mnt/chroot/sys mount -o bind /dev /mnt/chroot/dev Answers obtained from…
code_fodder
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Why tail -f is not working for a proc file?

I have a proc file which is updated by a driver. In user space I am reading using tail. It is working fine, But when i give -f option for tail, It is not working. This means it is reading file contents which are already there but it is not reading…
Chinna
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How to enable sched_compat_yield?

I am not able to see the sched_compat_yield entry under /proc/sys/kernel/. How to enable this propery in the kernel (so that I can tweak it for some debugging purpose) ? Currently Available Entries: root@test ~ >ls…
Lunar Mushrooms
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