Red Hat ENTERPRISE LINUX 5 - DEPLOYMENT Deployment Manual page 59

Each process directory contains the following files:
• cmdline — Contains the command issued when starting the process.
• cwd — A symbolic link to the current working directory for the process.
• environ — A list of the environment variables for the process. The environment variable is given in
all upper-case characters, and the value is in lower-case characters.
• exe — A symbolic link to the executable of this process.
• fd — A directory containing all of the file descriptors for a particular process. These are given in
numbered links:
total 0
lrwx------ 1 root
lrwx------ 1 root
lrwx------ 1 root
lrwx------ 1 root
lrwx------ 1 root
lrwx------ 1 root
lrwx------ 1 root
lrwx------ 1 root
• maps — A list of memory maps to the various executables and library files associated with this
process. This file can be rather long, depending upon the complexity of the process, but sample
output from the sshd process begins like the following:
08048000-08086000 r-xp 00000000 03:03 391479
08086000-08088000 rw-p 0003e000 03:03 391479 /usr/sbin/sshd
08088000-08095000 rwxp 00000000 00:00 0
40000000-40013000 r-xp 0000000 03:03 293205 /lib/ld-2.2.5.so
40013000-40014000 rw-p 00013000 03:03 293205 /lib/ld-2.2.5.so
40031000-40038000 r-xp 00000000 03:03 293282 /lib/libpam.so.0.75
40038000-40039000 rw-p 00006000 03:03 293282 /lib/libpam.so.0.75
40039000-4003a000 rw-p 00000000 00:00 0
4003a000-4003c000 r-xp 00000000 03:03 293218 /lib/libdl-2.2.5.so
4003c000-4003d000 rw-p 00001000 03:03 293218 /lib/libdl-2.2.5.so
• mem — The memory held by the process. This file cannot be read by the user.
• root — A link to the root directory of the process.
• stat — The status of the process.
• statm — The status of the memory in use by the process. Below is a sample /proc/statm file:
263 210 210 5 0 205 0
The seven columns relate to different memory statistics for the process. From left to right, they
report the following aspects of the memory used:
1. Total program size, in kilobytes.
root 64 May
root 64 May
root 64 May
root 64 May
root 64 May
root 64 May
root 64 May
root 64 May
8 11:31 0 -> /dev/null
8 11:31 1 -> /dev/null
8 11:31 2 -> /dev/null
8 11:31 3 -> /dev/ptmx
8 11:31 4 -> socket:[7774817]
8 11:31 5 -> /dev/ptmx
8 11:31 6 -> socket:[7774829]
8 11:31 7 -> /dev/ptmx
/usr/sbin/sshd
Process Directories
33