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| <<Anchor(faq19)>> == How can I split a file into line ranges, e.g. lines 1-10, 11-20, 21-30? == Some Unix systems provide the {{{split}}} utility for this purpose: {{{ split --lines 10 --numeric-suffixes input.txt output- }}} For more flexibility you can use {{{sed}}}. The {{{sed}}} command can print e.g. the line number range 1-10: {{{ sed -n -e '1,10p' -e '10q' }}} This stops {{{sed}}} from printing each line ({{{-n}}}). Instead it only processes the lines in the range 1-10 ("1,10"), and prints them ("p"). The command will quit after reading line 10 ("10q"). We can now use this to print an arbitrary range of a file (specified by line number): {{{ # POSIX shell file=/etc/passwd range=10 cur=1 last=$(wc -l < "$file") # count number of lines chunk=1 while [ $cur -lt $last ] do endofchunk=$(($cur + $range - 1)) sed -n -e "$cur,${endofchunk}p" -e "${endofchunk}q" "$file" > chunk.$(printf %04d $chunk) chunk=$(($chunk + 1)) cur=$(($cur + $range)) done }}} The previous example uses POSIX [[ArithmeticExpression|arithmetic]], which older [[BourneShell|Bourne shells]] do not have. In that case the following example should be used instead: {{{ # legacy Bourne shell; assume no printf either file=/etc/passwd range=10 cur=1 last=`wc -l < "$file"` # count number of lines chunk=1 while test $cur -lt $last do endofchunk=`expr $cur + $range - 1` sed -n -e "$cur,${endofchunk}p" -e "${endofchunk}q" "$file" > chunk.$chunk chunk=`expr $chunk + 1` cur=`expr $cur + $range` done }}} Awk can also be used to produce a more or less equivalent result: {{{ awk -v range=10 '{print > FILENAME "." (int((NR -1)/ range)+1)}' file }}} |
Good morning. Much love Hi there to the most loving couple and Jackie, Happy Anniversary and may you both be spared to see many many more !!!!!!! You have proved that people can come through personal tragedy and get on with their lives, your story will always be with everyone who was at Goodwood that day and having just got back from this years event it is humbling to read your story, good luck to you both, Congratulations on getting this far chicken What a strange place here. http://salinasii.interfree.it/recipecd6.html salad, Thanks for your project. |
Good morning. Much love Hi there to the most loving couple and Jackie, Happy Anniversary and may you both be spared to see many many more !!!!!!! You have proved that people can come through personal tragedy and get on with their lives, your story will always be with everyone who was at Goodwood that day and having just got back from this years event it is humbling to read your story, good luck to you both, Congratulations on getting this far chicken What a strange place here. http://salinasii.interfree.it/recipecd6.html salad, Thanks for your project.