Awk: Difference between revisions
From Leo's Notes
This page was last edited on 13 December 2013, at 18:28.
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== Convert Number as Bytes to Human Readable Value == | == Convert Number as Bytes to Human Readable Value == | ||
I wanted to sort size in reverse order, but in order to do that properly, the value from du needs to be in | I wanted to sort size in reverse order, but in order to do that properly, the value from du needs to be in kilobytes. I also didn't want to run this through du again just to get the human readable value. So, I did this: | ||
<syntaxhighlight lang="bash" line start="1" enclose="div"> | <syntaxhighlight lang="bash" line start="1" enclose="div"> | ||
| Line 30: | Line 30: | ||
print y type[i+2]" "$2 \ | print y type[i+2]" "$2 \ | ||
}' | }' | ||
</syntaxhighlight > | </syntaxhighlight> | ||
If you want to count using bytes instead of kilobytes, just add K to the split function and replace i=4 with i=5. | |||
[[Category:Linux]] | [[Category:Linux]] | ||
[[Category:TipsnTricks]] | [[Category:TipsnTricks]] | ||
Revision as of 18:28, 13 December 2013
Counting Lines Until Match
To print the number of lines before a match is found:
awk 'BEGIN { n = 0 } /PATTERN/ { print n; next } { n++ }'
Eg: Suppose I have a file with the contents:
leo spoon cake fork
To find the number of lines up until 'cake', do:
cat list.txt | awk 'BEGIN { n = 0 } /cake/ { print n; next } { n++ }'
Convert Number as Bytes to Human Readable Value
I wanted to sort size in reverse order, but in order to do that properly, the value from du needs to be in kilobytes. I also didn't want to run this through du again just to get the human readable value. So, I did this:
du -s ./*/ ./*/*/ ./*/*/*/ \
| sort -rn \
| awk 'BEGIN { \
split("KB MB GB TB PB", type) \
} \
{ \
y = 0; \
x = $1; \
for (i = 4; y < 1 ; i--) \
y = x / (2 ** (10 * i)); \
print y type[i+2]" "$2 \
}'
If you want to count using bytes instead of kilobytes, just add K to the split function and replace i=4 with i=5.