As I take your meaning, I don't believe that any of these answers are correct. eval is not necessary in any way, nor do you have any need even to twice evaluate your variables. It's true, @Gilles comes very close, but he does not address the problem of possibly overriding values and how they sh...

I have a rather large .msg file formatted in the UIEE format. $ wc -l big_db.msg 8726593 big_db.msg Essentially, the file is made up of entries of various length that look something like this: UR|1 AA|Condon, Richard TI|Prizzi's Family CN|Collectable- Good/Good MT|FICTION PU|G.P. Putnam & So...

Here's a solution that could work: lines=$(wc -l </tmp/file) seq 1 $((lines/15+1)) $lines | sed -n 'N;s|\(.*\)\(\n\)\(.*\)|\1,\3{\3{:n\3\ /\\n$/!{N;bn\3}}\ w /tmp/uptoline\3\ d}\ \3|;h;x;s/\(.*\)\(\n.*\)/\1/p;x;s//\2/;$d;D' | sed -nf - /tmp/file It works by allowing the first sed to write th...

I have another grep/awk/sed issue within the attached HTML code below. Given is a simple HTML file with table inside....the HTML is generated by a smart meter (household energy meter)...inside the html table 2 values are presented that are important to myself....Pplus and Pminus.....so actual Po...

I have noticed that | is used to send results of first command to the another. I would like to kill all processes that match a name. This is what pgrep normally does: $ pgrep name 5089 5105 And multiple arguments seem to work with kill: sudo kill 5089 5105 But this is wrong: pgrep name | k...