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Linux in a Nutshell

This directory of Linux commands is from Linux in a Nutshell, 5th Edition.

Click on any of the 687 commands below to get a description and list of available options. All links in the command summaries point to the online version of the book on Safari Bookshelf.

Buy it now, or read it online on Safari Bookshelf.



readelf

readelf option[...] elffiles

Display information about one or more ELF (Executable and Linking Format) object files. At least one option is required to specify the information to be displayed for each file. readelf does not currently work on archive files or 64-bit ELF files.

Options

-a, --all

Display all. Equivalent to -A -d -h -I -l -r -s -S -V.

-A, --arch-specific

Display architecture-specific information, if any.

-d, --dynamic

Display the dynamic section.

-D, --use-dynamic

When displaying symbols, use the symbol table in the dynamic section, not the symbols section.

-e, --headers

Display all headers. Equivalent to -h -l -s.

-h, --file-header

Display the ELF header at the beginning of the file.

-H, --help

Display help information and exit.

-I, --histogram

Display a histogram of bucket bit lengths when displaying the symbol tables.

-l, --program-headers, --segments

Display the segment headers, if any.

-n, --notes

Display the NOTE segment, if any.

-r, --relocs

Display the relocation segment, if any.

-s, --symbols, --syms

Display entries in symbol table sections, if any.

-S, --section-headers, --sections

Display the section headers, if any.

-u, --unwind

Display the unwind section, if any (currently applies only to IA64 ELF files).

-v, --version

Display version information and exit.

-V, --version-info

Display the version sections, if any.

-w[option] , --debug-dump[=option]

Display the debug sections. If specified with an option, display only that section. The options shown here in parentheses are for -w; the words preceding them are for --debug-dump. The options are abbrev (a), frames (f), frames-interp (F), info (i), line (l), loc (o), macro (m), pub-names (p), ranges (r) and str (s).

-W, --wide

Don't break output lines at 80 columns. The default is to break them. Useful for wide terminals.

-x num, --hex-dump=num

Display a hexadecimal dump of the section number.


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