Linux: Execute a Program Periodically
Explains how to execute a command at short intervals, display the output screen and highlight changes in output using the watch command on Linux.
Tag Archives: procfs
Linux: How to View Threads of a Process
Objective: View threads of a process on Linux.
Linux: Get Process Arguments
Objective: Get the command line arguments passed to a process on Linux using proc.
Linux: Recover Deleted File That Is Still Open
Objective: A file has been accidentally deleted on Linux but another process still has the file open. Restore or recover the file using /proc filesystem.
Linux: Clear Memory Cache
The Linux kernel uses unused main memory as a cache to keep page cache, filesystem dentries and inodes. The use of the cache or buffer memory accelerates access to files stored on non volatile storage such as hard disks. The cached items can be cleared from memory by sending a signal to the Linux kernel using the /proc filesystem or the sysctl command.
Linux: Check CPU for 64-bit Support
To check for a 64-bit capable CPU on a x86 system running on Linux, we can make use the /proc/cpuinfo file. Note that this will not determine if the OS is 64-bit or not. It will only determine if the CPU is capable of running a 64-bit OS. To check if the Linux OS is running 32-bit or 64-bit, you can refer to this article instead.
Linux: Swap Usage per Process
You run the free command on a Linux machine and it reports that swap space is being used. How do you determine if a process is using swap memory? Or how do you determine which processes are using swap memory? The short answer is to use the procfs or /proc filesystem.
Linux: Hide Processes from Other Users
If you are into Linux OS hardening, then one of the ways to improve security is to hide the display of running processes and their arguments from other users. This feature is available if you are on a Linux kernel version of 3.2 or above that supports the new hidepid mount option for procfs or /proc filesystem.
Linux: Find Process Listening on Port Using Proc FS
Let’s say you have a socket that is listening on a particular port. How do you find the process that is listening on a port just by using the Linux Proc FS or /proc filesystem?
