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(Bash) Remote sed editing multiple hosts: How to quote - bubnoff

Thu, 22 Sep 2011 04:41:55 UTC

Here's a quick one-off trick for sed editing conf files on remote hosts. I will post the core sed command first, showing the crazy quoting, then a for loop demonstrating how one might tackle multiple hosts. Took me a few tries to get the quoting so thought I'd save others the trouble. In this example I had to change the homepage variable in a remote conf file. * The URL needs single quotes in the conf file. '\'' does the trick. * The End of Line metacharacter '$' needs to be escaped for bash. Like so, \$. * Finally, note that the sed expression is wrapped in single quotes while the whole command is wrapped with double quotes. I tried other combos -- if you know why this is so, do tell.

(Bash) Delete blank lines with sed - bubnoff

Wed, 11 May 2011 05:39:57 UTC

Find any line with beginning of line followed by zero or more tabs, spaces followed by end of line -- delete it.

(Bash) Merge lines with SED. - bubnoff

Wed, 11 May 2011 05:16:19 UTC

Merge line below to current line. "This one-liner joins two consecutive lines with the "N" command. They get joined with a "\n" character between them. The substitute command replaces this newline with a space, thus joining every pair of lines with a whitespace." From catonmat here: http://www.catonmat.net/blog/sed-one-liners-explained-part-one/

(Bash) HTML Table to CSV in AWK [awk] - bubnoff

Fri, 15 Apr 2011 12:30:03 UTC