logician and engineer

How to be a good software test engineer--------Record yourself reading "win in Test" reading notesCome to Beijing almost a year, in their favorite post happy job, here is the beginning of their own career, has been hoping to go further in the test of their future position, thinking about how to become a good test engineer, the recent use of every night back to rest time, gradually read the "win in the test"

The growth path of an excellent Web front-end engineer and the development path of web Front-end I have two front-end programmers: First, I have been asking: How to learn the frontend? In the second case, the front-end is very simple. I have never heard of anyone asking:How to be an excellent or even excellent WEB front-end engineer. What is: front-end engineers? A front-end

Original address By the end of this morning, there have been about 680 million web pages on the Internet, and they are still growing rapidly. Today, take a serious look at the topic of Web engineers about their work, about their careers, about HTML, about Python, about browsers, about the world. There are some friends around the child is about to be born, in the future can be considered as a Web engineer it ~ Every day we, in (still) quiet office, fa

software, switchesApache 2.2.xTomcat 5.5.XDatabase systemUp to 8 Internet IP addresses, please design a system:1, the use of dual Apache web server front-end;2, the use of the AJP connected to the 3 Tomcat application server, these tomcat is configured to cluster, it is necessary to consider the Apache to the back end of the allocation, the allocation of a fully balanced approach, configure the use of cookies to achieve session stickness;3.1 database servers only Tomcat needs to be connected an

files in Linux?16) What are the system calls that create the process?17) How many different ways to call schedule () for process switching?is the Linux scheduler scheduling processes based on the dynamic or static priority of the process?19) which is the core data structure of the process scheduling?20) such as finer, unload a module?21) What space are the modules and applications running separately?Do floating-point operations in Linux be implemented by the application or the kernel?23) Can th

Big Brother talk about the path of Java engineer MasterJVM AspectJVM Memory StructureHeap, stack, method area, direct memory, heap, and stack differencesJava memory modelMemory visibility, reordering, sequential consistency, volatile, lock, finalGarbage collectionDecision of memory allocation policy, garbage collector (G1), GC algorithm, GC parameter, object survivalJVM parameters and Tuning Java object modelOop-klass, Object headerHotSpotInstant com

also divert, ssh-copy-id-i ssh/id_rsa.pub [email protected], also enter the root password of a server in the middle.5) Done, now the AB between the landing has no longer need password.5. A simple description of the seven levels of the OSI reference ModelPhysical layer: Network cable, optical cable, copper wire These things can be seen by the naked eye.Data Link layer: frame, MAC addressNetwork layer: Packet, IP addressTransport layer: TCP protocol, UDP protocolSession Layer: Establish session,

out the statements in the Crontab24, use a command to see the current system has started the service listening to the port25. Use the Linux system command to count the number of connections to the establish state26, a ext3 file partition, when using touch new file times wrong, the error message is that the disk is full, but use df-h to view the partition information only used 50%, please analyze the specific reason27. List common packaging tools and write the corresponding decompression paramet

52416 52404 1%/sdblabel/dev/sr0 0 0 0-/media/rhel_6.4 i386 Disc 1Du command:Du does not add parameters, the size of files and directories under the current path is listed by default-S: Only the total size is listed[Email protected] ~]# du-s/root/43700/root/-H: Displayed in a human-readable way[Email protected] ~]# du-sh/root/43m/root/--max-depth: Specify the maximum depth[email protected] ~]# du--max-depth=1-h/Only the bottom level of the root path occupies space, which is commonly used to anal

protected] ~]# mount/dev/sda2 on/type ext4 (rw)Proc On/proc type proc (rw)Sysfs On/sys type SYSFS (rw)--View the label of the partition when the mount is displayed[Email protected] ~]# mount-l2) Mount MountSyntax formatMount [-FNRSVW] [-t vfstype] [-O options] Device dirMount Optionsasync--Asynchronoussync--Synchronizationatime--Access Timenoatime--do not change access timeauto--AutomaticDEFAULTS--RW, suid, Dev, exec, auto, Nouser, Async,and relatime.remount--re-mountExample:[Email protected] ~

Disk Management---Partitioning1, the process of partitioningPartition, create file system, mount use2, the basic command of the partitionfdisk--partition commands, files below 2TBPartprobe--rhel5PARTX--RHEL6 notification kernel reread partition tableparted--partition command, support for large files3. How to name the disk/dev/sdaSD —————— represents a serial deviceSATA, SCSI, SAS, SSD/dev/hdaThe HD ———— represents a device with a/DEV/SDA1: Represents the first partition of the first serial devic

these numbers2) Print the second largest number of these numbers3) Delete the smallest number4) Print the remaining number andAnswer:" Heool " "". Join (s)print"-" . Join (s) Print L7.To generate a list of 1~100 inside odd numbers using a list deductionThe result is: [1, 3, 5, 7, ..... 99]Answer: for in range (1, 2)]print(L) for inch if x% 2 = 0]print(L)8.Generate a list of squares with a value of 1 ~ 9, minus all the odd squaresAnswer: for in range (2, 2)]print(L) for inch if x% 2 = = 0]pri