How to find out more about a given binary
All you ever wanted to know about a given binary.
| Command | Description / Example |
|---|---|
| which | Looks at your $PATH and displays which executable you will get
# which ld /usr/bin/ld |
| whereis | Looks in a bunch of standard places to give a clue about where something is
# whereis ld ld: /usr/bin/ld |
| what | Prints out version info from binary
# what /usr/bin/ld /usr/bin/ld: |
| ldd | List dynamic dependencies tells you what libraries it wants and where it is expecting to find them
# ldd /usr/bin/ld -lc.1 => /usr/lib/libc.so.1.10 -ldl.1 => /usr/lib/libdl.so.1.0 |
| file | Makes a guess about file contents. Uses /etc/magic
# file /usr/bin/ld /usr/bin/ld: sparc depend paged dynamically linked |
| size | How big is an executable
# size /usr/bin/ld text data bss dec hex 122880 32768 40104 195752 2fca8 |
| nm | name list — doesn't have one if stripped
# nm /usr/bin/ld
nm /usr/lib/libc.so.1.10
000015f8 T .div
00000790 T .mul
00027798 T .ptr_call
000024d8 T .rem
00022c08 T .stret1
:
: |
| version | version info — only for SPARCcompilers
# version `which CC`
version-id of "/opt/SUNWspro/bin/CC":
SC2.0.1 |
| showrev | Print the revision info for command
# showrev -c /usr/bin/ld
PATH is:
/usr/sbin:/usr/bin:/usr/dt/bin:/bin:/usr/ucb
PWD is:
/
LD_LIBRARY_PATH is not set in the current environment
-------------------------------------------------------------
File: /usr/bin/ld
=================
File type: ELF 32-bit MSB executable SPARC Version 1,
dynamically linked, stripped
Command version: SunOS 5.8 Generic February 2000
File mode: r-xr-xr-x
User owning file: root
Group owning file: bin
Library information:
libc.so.1 => /usr/lib/libc.so.1.10
ldl.1 => /usr/lib/libdl.so.1.0
Sum: 48668
|