I am using AIX 6.1 ksh shell.I want to use one liner to do something like this:cat A_FILE | skip-first-3-bytes-of-the-fileI want to skip the first 3 bytes of the first line; is there a way to do this?
Skip first 3 bytes of a file
shell;text processing;aix;ksh
Old school  you could use dd:dd if=A_FILE bs=1 skip=3The input file is A_FILE, the block size is 1 character (byte), skip the first 3 'blocks' (bytes).  (With some variants of dd such as GNU dd, you could use bs=1c here  and alternatives like bs=1k to read in blocks of 1 kilobyte in other circumstances.  The dd on AIX does not support this, it seems; the BSD (macOS Sierra) variant doesn't support c but does support k, m, g, etc.)There are other ways to achieve the same result, too:sed '1s/^...//' A_FILEThis works if there are 3 or more characters on the first line.tail -c +4 A_FILEAnd you could use Perl, Python and so on too.