Home > Know-how > Linux > Shell, bash > inline rotate (keep <n> lines) Linux Reference 6.1.3 inline rotate (keep <n> lines)

20.02.2008

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X X

# cat /usr/local/bin/inlinerotate.sh

#!/bin/bash

# Usage: inlinerotate.sh <file> <num_lines> <owner> <group>
# e.g.   inlinerotate.sh /tmp/foo.log 999 nobody nobody

echo $1 - keep $2 lines

tail -$2 "$1" > /tmp/__tmp_$$
mv -f /tmp/__tmp_$$ "$1"

chown $3:$4 "$1"

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