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Author Topic: Beberapa Script Bash dan command untuk Sysadmin  (Read 582 times)

Offline Adi Sunardy

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Beberapa Script Bash dan command untuk Sysadmin
« on: July 21, 2010, 03:19:40 PM »
Dalam keseharian pekerjaan sysadmin, kita bisa melakukan beberapa perintah atau membuat script sederhana untuk membantu pekerjaan. Beberapa diantaranya adalah:

  • Mengetahui User last login ke system (penyerdehanaan dari output command 'last')
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# !/usr/bin/bash
if [ $# -eq 1 ]
then
echo "IPADDRESS : $1"
ssh unadm@$1 ' echo "HOSTNAME: $(hostname) \t  DATE: $(date)"'
ssh unadm@$1 "sudo lsuser -a time_last_login ALL | sed 's/\ time_last_login=/:/g'" > userlogins
cat userlogins | grep : > temp; awk -F":" '{print $2}' temp | xargs -I {} perl -le "print scalar localtime ({})" > temp1
awk -F":" '{print $1}' temp > temp2
paste temp2 temp1 | awk -F" " '{ printf "%-20s %s %s %-2d %s %d\n", $1, $2, $3, $4, $5, $6 }'
rm temp temp1 temp2
exit
else
echo "USAGE: $0 <IPADDRESS>"
exit 1
fi
bash-3.00$
  • Mengetahui Jumlah login yang dilakukan semua user di system (menghitung dari command 'last'). Outputnya valid sejak tanggal file /var/log/wtmp terakhir dimodifikasi
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last | sort | cut -f1 -d' ' | grep -v ^$ | uniq -c
  • Mengetahui user yang melakukan login attempt namun failed (bisa karena salah password/user)
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lastb
  • dan juga bisa dihitung dengan cara yang sama dengan point no 3
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lastb | sort | cut -f1 -d' ' | grep -v ^$ | uniq -c
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    Adi Sunardy
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