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And `%!command` to replace the whole file. That's how editing hexadecimal in vim works. `%!xxd` to turn it, then `%!xxd -r` to turn it back. Another useful one

• susam 10y ago
  I use this often. I usually enter `:%!xxd -g1` to show each byte value separately instead of showing two bytes together. $ printf "\x00\x01\x02\x03" | xxd 0000000: 0001 0203 $ printf "\x00\x01\x02\x03" | xxd -g1 0000000: 00 01 02 03 While editing binary files in Vim, one needs to be careful about setting the binary option before editing a binary file or opening the binary file with `-b` option. For example, printf "\x00\x01\x02\x03" > a.bin vim a.bin :%!xxd -g1 would display 0000000: 00 01 02 03 0a ..... (The `printf` and `vim` commands are entered in the shell. The `:%!xxd` command is entered in Vim.) In the above example, a newline has been added by Vim where none existed in the binary file. In fact, if you then run `%!xxd -r` followed by `:w`, this additional newline would be written back to the file. Here is the right way to preserve the binary data in a binary file. printf "\x00\x01\x02\x03" > a.bin vim -b a.bin :%!xxd -g1 would display 0000000: 00 01 02 03 .... Only the four bytes in the file appear now. Alternatively, one may enter `:set bin` in Vim before editing a binary file.
• noisy_boy 10y ago
  You can also use a range e.g. `5,10!column -t` would align columns for lines 5 to 10.