lastlog

statistics executed by the system kernel. When a process is terminated, a record is written to the statistics file. Process statistics are used to provide command usage statistics for basic services in the system. (3) error log. Executed by Syslogd (8), various system daemon processes, user programs, and kernels report noteworthy events to the File "/var/log/messages. In addition, many UNIX programs create logs. Servers that provide network services such as HTTP and FTP also maintain detailed

;auditconfiguration.includerelationships=true; Auditconfiguration.loadrelationships=true; auditconfiguration.defaultauditable=true;//Customize the audit for Task entity custom Check log entityAuditconfiguration.isauditable() . notaudited (t=t.taskextended). Formatwith (t= T.status, V =Formatstatus (v));//Set the display member when status was a foreign key when the state foreign key is set to show componentAuditconfiguration.isauditable() . DisplayMember (t= T.name);Create a check logvar N

. Logdata.where (A = a.ID = = 9). FirstOrDefault (); us. Logdata.remove (delete); Save US normally. SaveChanges (); Get audit log var log = Logaudit. Lastlog; Convert the log to an XML string, or to the XML file, string dda = log. TOXML (); }The final result is as follows:We can see that we are conveniently

Marco 2016 new Linux+python high-end OPS third week assignment 1, lists the user names of all logged-in users on the current system, note that the same user logs on multiple times, only once. [[emailprotected]~]#who|awk ' {print$1$ NF} ' |uniq-d[[emailprotected]~]#who yicx:0 2016-08-2220:27 (: 0) rootpts/0 2016-08-2220:27 (192.168.102.149) 2, remove information about the user who last logged in to the current system. [[emailprotected]~]#lastlog|grep

Commands related to user permissions 1. Create groupadd test, modify groupmod-n test2 test, change the name to test2, delete groupdel test, view group groups root2, and perform user operations: -B: set the basic path as the user's login directory usermod-B/home root;-c comment on the user... -D: Set the user's logon directory usermod-d/home root;-D: Change The usermod-D-e to set the user's validity period usermod-e 2013-2-1;-f: After the user expires, make the password invalid usermod-f root;-g

Common Logon files:/Var/log/cron: records crontab running status and/etc/crontab./Var/log/dmesg: records the information generated during the core detection process when the system is started./Var/log/lastlog: records information related to the last time all accounts in the system log on to the system./Var/log/maillog: records the mail sending and receiving information./Var/log/messages: a very important file that records information about system erro

exits. This is usually used to prevent non-root User Logon during system maintenance. Only terminals registered in/etc/securetty allow the root user to log on. If this file does not exist, the root user can log on to any terminal. The/etc/usertty file is used to add access restrictions to users. If this file does not exist, there are no other restrictions. After the username is analyzed, login searches for/etc/passwd and/etc/shadow to verify the password and set other information about the acc

location where logs are stored. What should I do? In this case, you can use strings to view the/sbin/syslogd file. I have only seen this kind of administrator in the book, at least I have never met: P. This configuration file records the directories in which the system stores some logs, such as the secure file. Next we will clean up and modify logs based on this file.The log clearing program code that can be publicly available on the Internet is rough. I have seen the most exaggerated log clear

log on to any terminal. The/etc/usertty file is used to add access restrictions to users. If this file does not exist, there are no other restrictions. After the username is analyzed, login searches for/etc/passwd and/etc/shadow to verify the password and set other information about the account, such as what is the main directory and what shell is used. If no main directory is specified, the root directory is used by default. If no shell is specified,/bin/bash is used by default. After the logi

database we just created [root @ xiaoluo mysql] # cd xiaoluo/[root @ xiaoluo] # lsdb. opt 3./var/log mysql database log output storage location Some log output locations of our mysql database are stored in the/var/log directory. [root@xiaoluo xiaoluo]# cd [root@xiaoluo ~]# cd /var/log[root@xiaoluo log]# lsamanda cron maillog-20130331 spice-vdagent.loganaconda.ifcfg.log cron-20130331 mcelog spooleranaconda.log cups messages

used to control, obtain, and manage the status of acpi. 9)/var/run/utmp records the currently logged-on users;10)/var/log/lastlog records the last logon information of each user;11)/var/log/btmp records incorrect logon attempts;12)/var/log/dmesg kernel log;13)/var/log/cpus CPU processing information;14)/var/log/syslog event records the monitoring program log;15)/var/log/auth. log user authentication log;16)/var/log/daemon. log system process log;17)/

directory is used by default. If no shell is specified,/bin/bash is used by default.　After the login program is successful, the latest login information (recorded in/var/log/lastlog) will be output to the corresponding terminal, and check whether the user has any new emails (in/usr/Spool/mail ). Then set various environment variables: For bash, the system first looks for the/etc/profile script file and runsThen, if the. bash_profile file exists in th

. It should be more stable than other LKM, and the stability of LKM will seriously affect the system stability, therefore, we must be cautious when selecting a model. Even if the function is good, the system will be suspended after a bit of play and the system will be discovered by others. Function:[Root @ RHEL4 adore-ng] # cat FEATURES If you never used adore before, here's a list of supportedThings: O runs on kernel 2.4.x UP and SMP systemsO runs on kernel 2.6.x UP and SMP systems, i386 and x8

1. Understand the system status Uname: displays system information. Hostname: displays the host name. Last: List Recent user logins Lastlog: lists the recent logon status of each user. Free: displays memory usage You can also use vmstat to display detailed memory information. Top: System Monitor Ii. Process The system completes the work through processes. Each process has an independent process number. The system calls the pr

will be lost forever, and the attempt to read content from it will not be able to read anything. For example An error message such as rm $ badname 2>/dev/null [standard error] will be displayed and will not be stored in the system. If you need to place the error output and correct output in the same log file, you can use a special method like 2> 1. You can use View current jobs Jobs-l Abort and delete a job: kill-9% job ID One server is operated by multiple people. When the system is

to my host it?①last View last system boot and user logon information②lastlog View last User login information③lastb viewing a user who has failed to log on to my host　　 Find you, the terminal warning you, see you next time dare not 　　Some new people like to use sudo to improve their power, but as a super administrator how can I let you casually use, even if you use, I can find out what you use sudo to do something bad, directly warn you

free Vmstat mpstat iostat SAR kill Chkconfig Last system security-related commands (13) passwd su sudo umask chgrp chmod chown chattr lsattr ps whoami View System User login Information Command (6) W who users last Lastlog Fingers view hardware-related commands (6) Ethtool Mii-tool Dmidecode DMESG Lspci Other (14) chkconfig Echo Yum Watch alias Unalias date Clear History Eject time Nohup NC xargs Advanced Linux Command memory for monitoring physical

command (6)Nmap lsof Route mail Mutt nslookup dig host traceroute tcpdump 10. Commands on disk and file system (10)Mount Umount DF du fsck dd dumpe2fs dump fdisk parted mkfs partprobe e2fsck mkswap swapon sync resize2fs 11. Commands to shut down and view system Information (3)Shutdown Halt Init 12, System Management related commands (8)Uptime Top free Vmstat mpstat iostat SAR (sysstats) chkconfig 13, system security-related commands (10)chmod chown chgrp chage passwd su

,chkconfig system security Related :chmod,chown ,chgrp,chage,passwd,su,sudo,umask ,chattr,lsattr View System login user Information :whoami,who,w,last,lastlog ,users,finger other :echo,printf,rmp,yum,watch ,alias,unalias,date,clear,history,eject,time ,nohup,nc,xargs,exec,export,unset,bc,type System performance monitoring advanced commands : memory :top,free,vmstat,mpstat Iostat,sarcpu:top,vmstat,mpstat,iostat,sar I/O:vmstat,mpstat,iostat,sar Process:

1. Document CollationWork number and name are recorded in the employee fileEmployee.txt:Jason SmithJohn DoeSanjay GuptaAshok SharmaRecord work number and salary in bonus fileBonus.txt:100 $5,000200300 $3,000400 $1,250Requires merging two files and outputting the followingProcessing results:Ashok Sharma $1,250Jason Smith $5,000John DoeSanjay Gupta $3,000# awk ' Argind==1{test[$1]=$0}argind==2{print test[$1],$2} 'Jason Smith $5,000200 John Doe $500300 Sanjay gupt A $3,000400 Ashok Sharma $1,250,