mirror of
https://github.com/chubin/cheat.sheets
synced 2024-11-19 03:25:44 +00:00
e388d3bfb5
It might be useful e.g. when removing docker containers:
docker ps -a | grep openeir | awk '{print $1 }' | xargs docker rm
18 lines
663 B
Plaintext
18 lines
663 B
Plaintext
# sum integers from a file or stdin, one integer per line:
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printf '1\n2\n3\n' | awk '{ sum += $1} END {print sum}'
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# using specific character as separator to sum integers from a file or stdin
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printf '1:2:3' | awk -F ":" '{print $1+$2+$3}'
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# print a multiplication table
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seq 9 | sed 'H;g' | awk -v RS='' '{for(i=1;i<=NF;i++)printf("%dx%d=%d%s", i, NR, i*NR, i==NR?"\n":"\t")}'
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# Specify output separator character
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printf '1 2 3' | awk 'BEGIN {OFS=":"}; {print $1,$2,$3}'
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# search for a paragraph containing string
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awk -v RS='' '/42B/' file
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# display only first column from multi-column text
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echo "first-column second-column third-column" | awk '{print $1}'
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