7.2.8 hexdump

Dump the contents of a file to standard output in hex format.

Syntax

hexdump [ -j bytes | --skip-bytes=bytes ] 
        [ -N bytes | --read-bytes=bytes ] 
        [ --aio=naio ] [ -x ]
        file-name
        [{ -w | --wallet } wallet-location ] 
        [{ -T | --trace } trace-level ]

Command Options

The options for the hexdump command are:

• file-name: Specifies the name of the file being output.

• -j, --skip-bytes: Optionally specifies the number of input bytes to skip.

• -N, --read-bytes: Optionally specifies the number of bytes to read and output.

• --aio: Specifies the number of asynchronous I/O channels used to process the command. Asynchronous I/O enables the command to initiate I/O operations and continue executing other tasks without waiting (blocking) for the I/Os to complete. The default value is 4, which generally provides an optimal balance of performance and resource utilization.

• -x: Displays the file contents in hex notation. This is the default behavior anyway.

• -w, --wallet: Optionally specifies the path to the Exascale wallet directory.

• -T, --trace: Optionally enables tracing, with the trace level (trace-level) set to 1 (minimum tracing), 2 (medium tracing), or 3 (maximum tracing). If the trace level is not specified, then minimum tracing is enabled by default.

  The trace file is written to the first accessible location in the following list:

  1. If the $ADR_BASE environment variable is set:

     $ADR_BASE/diag/EXC/xsh_<user-name>/<host-name>/trace/xsh_<date>.trc

  2. /var/log/oracle/diag/EXC/xsh_<user-name>/<host-name>/trace/xsh_<date>.trc

  3. /tmp/diag/EXC/xsh_<user-name>/<host-name>/trace/xsh_<date>.trc

Examples

Example 7-17 Dump the contents of an Exascale file

The following example dumps the contents of the file at @my-data/my-file to standard output in hex format.

$ xsh hexdump @my-data/my-file