4 ms·

I still pause to remember that I have to type 'if=' and 'of=' and 'bs=' instead of just remembering the order of arguments.

code_duck 8y ago
What always gets me is ssh, scp and sftp... having to specify oPort= for sftp compared to -p for ssh.
- trinitry3 8y ago
  You can use -P.
  - kasey_junk 8y ago
    Whoever made it -p in ssh & -P in scp can fuck right off.
    - cesarb 8y ago
      The reason is that scp was designed as a secure replacement for rcp, which was designed as a remote version of cp. The flags -p and -r were inherited from cp by rcp (see https://linux.die.net/man/1/rcp https://linux.die.net/man/1/rcp), so for compatibility scp had to use the same flags. As for ssh, I haven't looked at its history, but I suspect it's older than scp; the intuitive flag for "port" is -p, so that's what ssh used.
  - code_duck 8y ago
    Good to know. I wonder if that's a recent improvement? Last time I was doing lots of sysadmin work was 2011.
dmartinez 8y ago
`tldr`[0] can be helpful for quick references like this. I never worry about commands like `ssh` anymore because of this. This is the output for `dd`: $ tldr dd dd Convert and copy a file. - Make a bootable usb drive from an isohybrid file (such like archlinux-xxx .iso): dd if=file.iso of=/dev/usb_drive - Clone a drive to another drive with 4MB block and ignore error: dd if=/dev/source_drive of=/dev/dest_drive bs=4m conv=noerror - Generate a file of 100 random bytes by using kernel random driver: dd if=/dev/urandom of=random_file bs=100 count=1 - Benchmark the write performance of a disk: dd if=/dev/zero of=file_1GB bs=1024 count=1000000 [0]: https://github.com/tldr-pages/tldr https://github.com/tldr-pages/tldr
- deleted 8y ago
  [deleted]
- I_complete_me 8y ago
  I've been using a similar command called 'cheat' [pip install cheat] which does more or less the same thing. I wonder which of the two is more comprehensive. How would I check this efficiently?
pronoiac 8y ago
I'd prefer ddrescue or just pv, just for the progress meter, and saner arguments.

code_duck 8y ago

What always gets me is ssh, scp and sftp... having to specify oPort= for sftp compared to -p for ssh.

trinitry3 8y ago
You can use -P.
- kasey_junk 8y ago
  Whoever made it -p in ssh & -P in scp can fuck right off.
  - cesarb 8y ago
    The reason is that scp was designed as a secure replacement for rcp, which was designed as a remote version of cp. The flags -p and -r were inherited from cp by rcp (see https://linux.die.net/man/1/rcp https://linux.die.net/man/1/rcp), so for compatibility scp had to use the same flags. As for ssh, I haven't looked at its history, but I suspect it's older than scp; the intuitive flag for "port" is -p, so that's what ssh used.
- code_duck 8y ago
  Good to know. I wonder if that's a recent improvement? Last time I was doing lots of sysadmin work was 2011.

dmartinez 8y ago

`tldr`[0] can be helpful for quick references like this. I never worry about commands like `ssh` anymore because of this. This is the output for `dd`: $ tldr dd dd Convert and copy a file. - Make a bootable usb drive from an isohybrid file (such like archlinux-xxx .iso): dd if=file.iso of=/dev/usb_drive - Clone a drive to another drive with 4MB block and ignore error: dd if=/dev/source_drive of=/dev/dest_drive bs=4m conv=noerror - Generate a file of 100 random bytes by using kernel random driver: dd if=/dev/urandom of=random_file bs=100 count=1 - Benchmark the write performance of a disk: dd if=/dev/zero of=file_1GB bs=1024 count=1000000 [0]: https://github.com/tldr-pages/tldr https://github.com/tldr-pages/tldr

deleted 8y ago
[deleted]
I_complete_me 8y ago
I've been using a similar command called 'cheat' [pip install cheat] which does more or less the same thing. I wonder which of the two is more comprehensive. How would I check this efficiently?

pronoiac 8y ago

I'd prefer ddrescue or just pv, just for the progress meter, and saner arguments.