At the memory address,
0x7fffffffeb58 of a program lies a value, I want to find out the value of the address.
Is there a way to get the value just by using commands?
dd but to no avail.
To peek at memory addresses of a process, you can look at
/proc/$pid/mem. See also
/proc/$pid/maps for what's mapped in the process' address space.
You'll want to
seek() within that file to the location you want, which you should be able to do with
dd bs=1 skip="$((0x7fffffffeb58))" count=4 if="/proc/$pid/mem" | od -An -vtu4
Would read 4 bytes at that address and interpret them as an unsigned 32 bit integer.
Another approach is to attach a debugger to the process:
gdb --batch -ex 'x/u 0x7fffffffeb58' -p "$pid"
In any case, note that depending on the value of the
kernel.yama.ptrace_scope sysctl, you may need to have superuser privileges to do that.
If you want to access virtual memory of a specific process: refer to @Stéphane's answer.
If you want to access physical memory:
If you have
Alternative approach with hexdump:
hexdump -C --skip 0x7fffffffeb58 /dev/mem | head
See this question on StackOverflow.