linux sar logs

Linux under All files, at the login will also follow the login to read many configuration files. Learn some information before you introduce the reading order.Shell type for user loginLog-in ShellLog in normally via a terminalSu-usernameSu-l USERNAMENon-sign-on shellShell in the following waySu USERNAMETerminal window opened by graphical terminalShell scripts that are executed automaticallyBash's configuration fileGlobal configuration file/etc/profice

corresponding log file/var/log/btmpScreen toolRepresents a virtual terminal that runs in the foregroundKeep a script running in the background without interruptingNohup./test.sh Installation:Yum install-y Screen[Email protected] rsync]# screen #直接进入一个bash[[email protected] rsync] #ping www.baidu.comCtral a combo key and press D to exit the virtual terminal, but not the endScreen-ls viewing the virtual terminal listScreen-r ID into the specified terminal[[email protected] rsync]# Screen-ls #Pts-

Logrotate Introductionlog rotation is especially useful for log files with fixed file names, such as MySQL error log, regular query log, slow query log, and so on. Linux system has a very easy to use according to Logratate can achieve automatic rotation, this article describes its principle and usage. Logrotate is the tool for managing log files, in CentOS systems, where commands are located in/usr/sbin/logrotate, commonly used operations such as:-D,

The preparation of vsftpd in Linux learning logs-Linux Enterprise Application-Linux server application information. For details, refer to the following section. The setting of/etc/ftpusers is to restrict certain users on the system from using FTP to transfer files. The setting of/etc/ftphosts is to prohibit some hosts

: Adjust partition ID, file system typeL: Lists the kernel-supported partition IDs, which are the kernel-supported file systemsW: Save exitQ: Do not save exitThe following two instructions, after partitioning the disk, feel that using Fdisk on the/DEV/SDA operation, that is, the operation of the disk device files, make the partition, and then use the following instructions, so that the kernel to identify the partition.The starting disk may not be fully used, only the partition under which it is

information is present, Tomcat is turned offRoot 7010 1 0 Apr19? defunct >Finally, start TomcatNote: Log in to the Linux system using the root user, enter the Tomcat directory correctly, and then boot Tomcat after you have determined that Tomcat is closed, otherwise the newspapers port will be occupied abnormally.View the Tomcat log1, first switch to: CD usr/local/tomcat5/logs2, Tail-f Catalina.out3, so that the runtime can view the

Linux log files in the/var/log directory, you can view the log files by command. 1,cat messages can view a log file. 2, to achieve real-time updates, you can view the updated data through the tail command, such as TAIL-F messages. 3,tail Command parameters: -F Loop Read -Q does not display processing information -V displays detailed processing information Number of-c -n -S,--sleep-interval=s and-F are combined to ind

poisoning backward to ll-t in reverse chronological order to see the next time ranking before the execution of the script is normal or delete directly RM and MV commands and their dangerous commands determine which files in that directory you can manipulate CP-RF depth Copy TAR-ZXVF xxx.tar.gz File Open large files do not use VI with more or less and so on or the memory of small files with VI Firewall in/etc/sysconfig/iptables Echo 3 >/proc/sys/vm/drop_caches Relea

The shell version is troublesome. I am not familiar with the PHP version for linux conversion: The code is as follows: /*** Delete logs 7 days ago* @ Param $ logPath*/Function del7daysAgoLog ($ logPath ){If (empty ($ logPath) return;$ Handle = opendir ($ logPath );While ($ file = readdir ($ handle ))! = False ){$ Pos = strpos ($ file, '. log ');If ($ pos! = False (strtotime ("-1 week")> fileatime ($ log

, with RZ if not installed Lrzsz5 Put the contents of the public key into this file Authorized_keys, (need to use this command to convert the OpenSSH recognized key format, the default public key is not the otherSsh-keygen-i-F identity.pub >>authorized_keys6 Change authorized permissions for this filechmod Authorized_keys6 finally restart the SSH serviceService sshd Restart7 Select Key Login to move the key option to the first bit650) this.width=650; "Src=" Http://s1.51cto.com/wyfs02/M01/82/15/

:%s "' Export histfile="/var/log/history/${logname}/${user}@${user_ip}_$dt "chmod 600/var/log/history/${logname }/*history* 2>/dev/null Note: /var/log/history This is where the logging is stored and can be customized.A new folder is created under/var/log/history with each user name.[Email protected]/]# cd/var/log/history/[[email protected] history]# lltotal 20d-wx------2 Test Dennishan 4096 Jul 4 12:06 testd-wx------2 jerryhe jerryhe 4096 Jul 4 14:12 Jerryhe every time a user exits, a file with

systemsChkconfig Crond on #设为开机启动Service Crond start #启动Log records similar to MONGODB.LOG.2015-02-28T06-33-20 are generated daily in the/home/data/mongodb/mongodb_log directoryAnd keep only the last 7 days of logging.At this point, Linux is timed to cut the MongoDB database log and delete the log records before the specified number of days is complete.This article is from the "Intelligent Future _XFICC" blog, please be sure to keep this source http:

recorded, it is possible to enter the log records directory, file deletion or file modification, it is necessary to upload these files to the Log collection server in a timely manner, preferably a background real-time monitoring process, the directory under the file changes, Directly trigger the synchronization operation, the file timely synchronization to the Log collection server, the network also has all the records in real-time through the log process syslog, the log sent to the log server

tags:Prerotate: Instructions to be made before starting logrotate, such as modifying file propertiesPostrotate: A command that starts after logrotate, such as restarting a service.5.logrotate [-VF] logfile: Instruction logrotate Service, parameters,1)-V: Start display mode, will show the process of logrotate operation2)-F: Forces each login to enter the rotate action regardless of whether it conforms to the profile data.The instruction is added to the crontab, so it is executed automatically ev

/rsync directory ourselves and change the permissions to 777, so that it is easy to operate)vi /etc/rsyncd.confAnother line paste the content we copied, and then save the exitA machine start-up servicersync --daemonSee if it startsps aux |grep rsyncPre-prep work is done and you can start synchronizing filesCopy files from the local machine to the remote rsync server. The mode is started when the DST path information contains the "::" delimiterrsync [OPTION] ... SRC [[Email protected]]host::D EST

CatTail-f Log file description/var/log/message system startup information and error log, which is one of the most commonly used logs in red Hat Linux/var/log/secure Security-related log information/var/log/maillog message-related log information/var/log/cron log information related to timed tasks/var/log/spooler log information related to UUCP and news devices/var/log/boot.log Daemon starts and stops relat

To search for a specified date log file:Sed-n '/^ start date/,/^ end date/p ' log file > new file (output file)For example: query all the log content for the 2016-06-15 day:Sed-n '/^2016-06-15/,/^2012-06-16/p ' catalina.out > Catalina_20160615.outThe premise is that each line in the Catalina.out log starts with a date format! This article is from the "System website Operations" blog, please be sure to keep this source http://cgc243652136qq.blog.51cto.com/3989433/1792684Interception of Tomcat

#!/bin/shExport back_date= ' DATE +%y%m%d 'Export Backup_path=/home/oracle/dbbakecho ' Mkdir-p ${backup_path}/archivelog/${back_date} 'Rman msglog= $BACKUP _path/archivelog/${back_date}/arch_0_$back_date.log Connect target/;Delete Expired Archivelog all;Delete noprompt Archivelog until time ' sysdate-1 ';ExitEofThe following is an Rman timed Delete archive Log method:Upload the del_arch.sh file in the attachment to the database server, the readable directory of the Oracle user, such as/home/orac

Tags: server-id mysqld column Master binlog data shell from ShelIn the/etc/my.cnf file, under "Mysqld", add:Server-id = 1 (guaranteed to be unique throughout the MySQL cluster)Log-bin = BinlogLog-bin-index = Binlog.indexTo restart MySQL:MySQL enable and view binary logsTo see if the log is enabledMysql>show variables like ' log_bin ';View the current logMysql> Show master status;See binary log files with MysqlbinlogShell>mysqlbinlog mail-bin.000001View table StructureShow columns from tables;　　

containing the template style.// 查询包含关键字`123456`的日志内容grep "123456" demo.log// 执行结果line1 123456 aaline2 123456 bbline3 123456 ccline4 123456 dd// 查询包含关键字`123456`且包含`aa`的日志内容grep "123456" demo.log | grep "aa"// 执行结果line1 123456 aa// 查询不包含`aa`的日志内容grep -v "aa" demo.log// 执行结果line2 123456 bbline3 123456 ccline4 123456 ddline6 654321 bbline7 12line8 34line9 56line0 78// 查询包含关键字`123456`但不包含`aa`的日志内容grep "123456" demo.log | grep -v "aa"// 执行结果line2 123456 bbline3 123456 ccline4 123456 dd// 查询包含关键字`123