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Full Discussion: Sed: -e expression #1, char 20: unterminated address regex
Top Forums UNIX for Beginners Questions & Answers Sed: -e expression #1, char 20: unterminated address regex Post 303035257 by jim mcnamara on Friday 17th of May 2019 02:56:45 PM
Old 05-17-2019
I'm with Rudi. When I have problems trying something like a complex sed command over ssh because of quoting
Steps
1. make a note of my current shell - let's say it is bash
2. play with my command on one "home" box.
3. once I got it working at "home":
paste the command into a simple two line shell script, let's call it t.sh
Code:
#!/bin/bash    
[paste required external env variables here if needed]
[paste command here]

4. automate it:
Code:
for i in `cat servername`
do
   scp myusername@$i t.sh /tmp/t.sh
   ssh myusername@$i 'chmod +x /tmp/t.sh && /tmp/t.sh'
done

This looks like a lot of work. It is not. But when you execute a complex remote one-liner command it can mess up by being garbled by ssh and your command line or wrong environment variable settings. Explaining to management why your script trashed 10 servers is a whole lot more work and time consuming.
 

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LEARN ABOUT X11R4

ssh-argv0

SSH-ARGV0(1)                                                BSD General Commands Manual                                               SSH-ARGV0(1)

NAME

     ssh-argv0 -- replaces the old ssh command-name as hostname handling

SYNOPSIS

     hostname | user@hostname [-l login_name] [command]

     hostname | user@hostname [-afgknqstvxACNTX1246] [-b bind_address] [-c cipher_spec] [-e escape_char] [-i identity_file] [-l login_name]
     [-m mac_spec] [-o option] [-p port] [-F configfile] [-L port:host:hostport] [-R port:host:hostport] [-D port] [command]

DESCRIPTION

     ssh-argv0 replaces the old ssh command-name as hostname handling.  If you link to this script with a hostname then executing the link is
     equivalent to having executed ssh with that hostname as an argument.  All other arguments are passed to ssh and will be processed normally.

OPTIONS

     See ssh(1).

FILES

     See ssh(1).

AUTHORS

     OpenSSH is a derivative of the original and free ssh 1.2.12 release by Tatu Ylonen.  Aaron Campbell, Bob Beck, Markus Friedl, Niels Provos,
     Theo de Raadt and Dug Song removed many bugs, re-added newer features and created OpenSSH.  Markus Friedl contributed the support for SSH
     protocol versions 1.5 and 2.0.  Jonathan Amery wrote this ssh-argv0 script and the associated documentation.

SEE ALSO

     ssh(1)

Debian Project                                                   September 7, 2001                                                  Debian Project
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