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RSS订阅原创 Change GitLab Root user password
1.gitlab-rails console production2. u=User.where(id: 1).first3. u.password='123456'4. u.password.confirmation='123456'5. u.save
2019-03-28 13:09:45
457
转载 linux cgroup技术介绍
原文:http://coolshell.cn/articles/17049.html前面，我们介绍了Linux Namespace，但是Namespace解决的问题主要是环境隔离的问题，这只是虚拟化中最最基础的一步，我们还需要解决对计算机资源使用上的隔离。也就是说，虽然你通过Namespace把我Jail到一个特定的环境中去了，但是我在其中的进程使用用CPU、内存、磁盘等这些计算资源其实还是...
2019-03-27 13:40:51
635
转载 Recovering an overflowed LVM volume configured with –virtualsize
edit the -cow file directly with a short perl script. The 5th byte is the ‘valid’ flag (see http://www.redhat.com/archives/linux-lvm/2006-September/msg00132.html) so all we need to is set it to ‘1’: ...
2018-05-29 14:54:18
173
原创 把cdrom变为yum repository
1. mount /dev/cdrom /mnt2. cd /mnt3. createrepo .4. change /etc/yum.repos.d[LocalRepos]name=LocalReposbaseurl=file:///mnt/enabled=1
2015-09-23 16:40:10
395
原创 snmptrap 命令解析
example:# snmptrap -v 2c -c public 10.10.12.219 "aaa" 1.3.6.1.4.1.2345 SNMPv2-MIB::sysLocation.0 s "just here" snmptrap命令-v 2cSnmp协议版本-c public共同体10.10.12.
2015-09-18 11:55:40
9077
原创 apache URL 区别大小写
1. enable the model: mod_speling.so2. add the "CheckSpelling on" into httpd.conf
2015-09-18 11:51:38
1076
原创 用iptables做路由
Machine A: 192.168.200.10Machine B: 192.168.198.50Iptables Machine: eth0 192.168.200.11 eth1 192.168.198.111. Machine A(windows): route -p add 192.168.198
2015-09-16 16:18:21
491
原创 iptrafic and tcpdump
1. iptraficiptrafic -s eth02. tcpdumpCapture packets from a particular ethernet interface# tcpdump -i eth0Capture only N number of packets# tcpdump -c N -i eth0Display Captured Packe
2015-09-16 15:41:55
357
原创 netstat samples
network monitoring: netstat List All Ports# netstat -anList Sockets which are in Listening State# netstat -lShow the statistics for each protocol#netstat -sDisplay PID and
2015-09-16 15:41:18
362
原创 vmstat samples
virtual memory Monitoring ---- vmstatvmstat fields description:Procs – r: Total number of threads/processes waiting to run. The amount of threads in the run queue. These are threads that a
2015-09-16 15:39:21
320
原创 iostat samples
I/O Monitoring ---- iostatiostat – Display only cpu statistics# iostat -ciostat – Display only disk I/O statistics# iostat -diostat – Display only network statistics# ios
2015-09-16 15:38:43
354
原创 linux screen samples
1. de-attach the running screenCTRL-A + "d"2. list the attached/de-attached screenscreen -ls3. re-attach a screenscreen -r4. activate the loging of screenscreen -l # when starting scree
2015-09-16 15:21:05
342
转载 putty 命令行参数
putty.exe [-ssh | -telnet | -rlogin | -raw] [user@]hostExample: putty -ssh -l vagrant -pw vagrant -P 2222 127.0.0.1 -V print version information and exit -pgpfp print PGP key fingerp
2015-09-16 15:14:14
1328
原创 linux performance monitoring
Linux Performance MonitoringCPU:You should understand the four critical performance metrics for CPU — context switch, run queue, cpu utilization, and load average.Context Switc
2015-09-14 13:53:14
366
原创 init: Id "co" respawning too fast: disabled for 5 minutes
"init: Id "co" respawning too fast: disabled for 5 minutes"The error messages exist in /var/log/messagescomment the line in /etc/inittabco:2345:respawn:/sbin/agetty 9600 ttyS1a
2015-09-14 11:31:33
1119
原创 OVM Concept: Oracle VM Agent
The Oracle VM Agent is a daemon that runs within dom0 on each Oracle VM Server instance. Its primary role is to facilitate communication between Oracle VM Server and Oracle VM Manager.Oracle VM Agen
2015-09-14 10:07:35
436
原创 OVM Concept: dom0 domU
Dom0 is the management domain of OVMOn X86 servers, dom0 kernel is actually a small-footprint Linux kernel with support for a broad array of devices, file systems, and software RAID and volume ma
2015-09-14 09:54:26
310
转载 Expect and TCL mini reference manual
Expect and TCL mini reference manualExpect is an extension of the TCL language. This means that you can do everything with expect that you can do with TCL.1 TCL expressionsFirst of
2015-09-11 15:31:05
801
转载 awk one line(老文章了，新老Administrator都用得到其中部分)
awk1line(老文章了，新老Administrator都用得到其中部分)
2015-09-11 15:13:26
579
原创 [NFS mount Error] System Error: No route to host.
Description: Iptables running and blocked the nfs portwhen running# mount -t nfs ovm1:/u01 /mntThe following error messages display:mount: mount to NFS server 'ovm1' failed: System Error: No
2015-09-09 13:55:55
740
1
原创 virt-install to create a new VM instance
The command to install the VM instance with virt-install command# virt-install -n VM1 -r 2048 -f /OVS/running_pool/VM1/System.img -s 20 --nographics -l nfs:192.168.200.11:/mnt -d -b xenbr0# vi
2015-09-09 13:32:33
396
原创 The Linux server failed to restart since /etc/fstab error
1. Login the server with single user mode2. remount the / partion# mount -o remount,rw /3. Edit the /etc/fstab and remove comment the error line4. verify with "mount -a" command5. reboot the
2015-09-09 10:50:00
311
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