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+[root@localhost ~]# vim /etc/logrotate.conf
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+[root@localhost ~]# cd /etc/logrotate.d
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+[root@localhost logrotate.d]# ls
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+bootlog chrony firewalld syslog wpa_supplicant yum
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+[root@localhost logrotate.d]# vim chrony
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+[root@localhost logrotate.d]# vim xunwang
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+/usr/local/src/nohup.out {
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+ daily
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+ rotate 15
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+ sharedscripts
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+ postrotate
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+ /bin/kill -HUP $(/bin/cat /var/run/syslogd.pid) &>/dev/null
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+ endscript
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+}
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+[root@localhost logrotate.d]# logrotate -vf /etc/logrotate.conf
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+rotating pattern: /usr/local/src/nohup.out forced from command line (15 rotations)
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+empty log files are rotated, old logs are removed
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+considering log /usr/local/src/nohup.out
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+ log needs rotating
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+rotating log /usr/local/src/nohup.out, log->rotateCount is 15
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+dateext suffix '-20220523'
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+glob pattern '-[0-9][0-9][0-9][0-9][0-9][0-9][0-9][0-9]'
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+glob finding old rotated logs failed
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+fscreate context set to unconfined_u:object_r:usr_t:s0
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+renaming /usr/local/src/nohup.out to /usr/local/src/nohup.out-20220523
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+creating new /usr/local/src/nohup.out mode = 0600 uid = 0 gid = 0
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+running postrotate script
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+[root@localhost logrotate.d]# ps aux
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+[root@localhost logrotate.d]# ps -le
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+[root@localhost logrotate.d]# top
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+top - 17:03:16 up 14 days, 1:15, 5 users, load average: 0.23, 0.19, 0.16
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+Tasks: 167 total, 1 running, 163 sleeping, 3 stopped, 0 zombie
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+%Cpu(s): 2.0 us, 2.4 sy, 0.0 ni, 95.6 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 s
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+KiB Mem : 3564524 total, 1326808 free, 907764 used, 1329952 buff/cache
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+KiB Swap: 8388604 total, 8388604 free, 0 used. 2382316 avail Mem
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+
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+ PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
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+11375 root 20 0 159220 6028 4324 S 1.0 0.2 0:26.02 sshd
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+11572 root 20 0 162916 3076 1572 S 0.7 0.1 0:09.41 top
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+29422 root 20 0 159220 6036 4324 S 0.7 0.2 3:11.69 sshd
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+ 9 root 20 0 0 0 0 S 0.3 0.0 22:31.97 rcu_sched
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+ 439 root 20 0 0 0 0 S 0.3 0.0 11:16.57 xfsaild/+
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+ 525 root 20 0 16336 1348 1148 S 0.3 0.0 3:18.33 lldpad
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+ 4879 root 20 0 4774312 591344 24724 S 0.3 16.6 2:07.52 java
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+[root@localhost logrotate.d]# top -p 4897
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+ PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
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+ 4897 root 20 0 4787676 594772 24732 S 0.3 16.7 2:13.33 Common-C+
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+[root@localhost logrotate.d]# vmstat
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+procs -----------memory---------- ---swap-- -----io---- -system-- ------cpu-----
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+ r b swpd free buff cache si so bi bo in cs us sy id wa st
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+ 1 0 0 1316272 2116 1332492 0 0 0 1 7 0 0 0 99 0 0
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+[root@localhost logrotate.d]# free
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+ total used free shared buff/cache available
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+Mem: 3564524 913488 1315288 39892 1335748 2376584
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+Swap: 8388604 0 8388604
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