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rpl --backup --dry-run "#PermitRootLogin prohibit-password" "PermitRootLogin yes" /etc/ssh/sshd_config
rpl --backup "#PermitRootLogin prohibit-password" "PermitRootLogin yes" /etc/ssh/sshd_config

 apt-get install rpl
 brew install rpl
rpl --backup  "#PermitRootLogin prohibit-password" "PermitRootLogin yes" /etc/ssh/sshd_config

rpl: Replacing "#PermitRootLogin prohibit-password" with "PermitRootLogin yes" (case 
sensitive; partial words matched)
rpl: 1 matches replaced in 1 out of 1 file

rpl --backup --dry-run "#PermitRootLogin prohibit-password" "PermitRootLogin yes" 

rpl: Simulating replacement of "#PermitRootLogin prohibit-password" with "PermitRootLogin yes" 
(case sensitive; partial words matched)

rpl: The files listed below would be modified in a replace operation

rpl: 1 matches found in 1 out of 1 file


usage: rpl [-h] [--version] [--encoding ENCODING] [-E] [-i] [-m] [-w] [-b] [-q] [-v] [-s] [-e] [-F]
           [--files] [-x GLOB] [-R] [-p] [-f] [-d]
           OLD-TEXT NEW-TEXT [FILE ...]

Search and replace text in files.

positional arguments:
  FILE                  `-' or no FILE argument means standard input

  -h, --help            show this help message and exit
  --version             show program's version number and exit
  --encoding ENCODING   specify character set encoding
  -E, --extended-regex  use extended regular expression module `regex'
  -i, --ignore-case     search case-insensitively
  -m, --match-case      ignore case when searching, but try to match case of replacement to case of
                        original, either capitalized, all upper-case, or mixed
  -w, --whole-words     whole words (OLD-TEXT matches on word boundaries only)
  -b, --backup          rename original FILE to FILE~ before replacing
  -q, --quiet           quiet mode
  -v, --verbose         verbose mode
  -s, --dry-run         simulation mode
  -e, --escape          expand escapes in OLD-TEXT and NEW-TEXT [deprecated]
  -F, --fixed-strings   treat OLD-TEXT and NEW-TEXT as fixed strings, not regular expressions
  --files               OLD-TEXT and NEW-TEXT are file names to read patterns from
  -x GLOB, --glob GLOB  modify only files matching the given glob (may be given more than once)
  -R, --recursive       search recursively
  -p, --prompt          prompt before modifying each file
  -f, --force           ignore errors when trying to preserve attributes
  -d, --keep-times      keep the modification times on modified files


See also[edit]