Linux Command 정리중…

ps command lstart를 이용한 Start Time 출력:
# ps -eo pid,lstart,cmd|grep -i 'java'|grep -v grep|awk '{print $1,$2,$3,$4,$5,$6}'

12007 Sat Jun 13 02:44:51 2020
15247 Wed Jul 22 16:32:00 2020
23009 Mon Jul 27 17:33:48 2020

# ps -eo pid,lstart,cmd|grep java|grep -v grep|cut -c-80

12007 Sat Jun 13 02:44:51 2020 /usr/java/bin/java -server -Xms512m -Xmx1024m -Ds
15247 Wed Jul 22 16:32:00 2020 java -server -Dcom.nara.jdf.config.file=conf/fact
23009 Mon Jul 27 17:33:48 2020 /usr/java/bin/java -server -Xms256m -Xmx512m -XX:
egrep을 이용한 주석제거:
# egrep -v '^(#|$)' *.conf
# cat /a.cf|egrep -v '^#|^$'
IP Address List 출력:
# grep -E -o "([0-9]{1,3}[\.]){3}[0-9]{1,3}" *.log
# grep -E -o "([0-9]{1,3}[\.]){3}[0-9]{1,3}" localhost_access_log.txt
sed를 이용한 arp table clear:
arp -an|awk '{print $1}'|sed s/[\(\)]//g|sed s/^/apr\ -d\ / > clear-arp
route add :
# route add -net 125.60.20.57 netmask 255.255.255.255 gw 49.50.1.43 dev em1
# route add -net 125.60.20.62 netmask 255.255.255.255 gw 49.50.1.43 dev em1


# netstat -rn
Kernel IP routing table
Destination     Gateway         Genmask         Flags   MSS Window  irtt Iface
125.60.20.57    49.50.1.43      255.255.255.255 UGH       0 0          0 em1
125.60.20.62    49.50.1.43      255.255.255.255 UGH       0 0          0 em1
49.50.1.0       0.0.0.0         255.255.255.128 U         0 0          0 em1
192.168.1.0     0.0.0.0         255.255.255.0   U         0 0          0 em3
192.168.251.0   0.0.0.0         255.255.255.0   U         0 0          0 em4
0.0.0.0         49.50.1.1       0.0.0.0         UG        0 0          0 em1

# Rebooting후에도 적용 될수 있도록 아래 작업 실행
#/etc/sysconfig/network-scripts/route-em1 파일 생성후 내용 저장

125.60.20.57  via 49.50.1.43 dev em1
125.60.20.62  via 49.50.1.43 dev em1

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