linux learning curve

27.3 "Linux learning is not difficult" Linux Network Command (3): ping command to test connectivity to the target computerUse the ping command to test connectivity to the target computer. The ping command uses the ICMP transport protocol to emit information that requires a response, and if the remote host has no problem with the network function, it will respond

at least one root partition, used to store system files, learning to use at least 5Gswap Equivalent to the virtual memory of the general size of the physical machine memory of about 1.5 times times, if the physical memory is greater than 8G, the swap partition only to 8 to 16, swap is not required to partition/boot: boot partition, boot file is generally very small and will not increase in the future, General 100~ 200MB interface Options Description:

created successfully, and if the process creation fails, it simply returns-1.watermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvbgfuemhpahvpxzewmdg2/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma== /dissolve/70/gravity/southeast ">Visible from the diagram. The above two execution results are counted as the parent process executes first . In general, it is indeterminate whether the parent process executes first or the child process before the fork is executed. This depends on the scheduling algorithm used

This essay will explain in detail the Linux system's advanced command of the network card, IP alias, and the knowledge of multiple NIC bindings under Linux. First, the Network card Advanced command In a previous essay on the CentOS of Linux Learning (ix)--LINUX System netw

) File formats (files format, such as passwd) Games and toys (gaming and entertainment) Miscellaneous (Miscellaneous, conventions and agreements, such as Linux file systems, network protocols, ASCII codes; environ global variables) Administrative Commands (administrator commands, such as Ifconfig) Man is searched in the order of chapter numbers in the manual.The man set the following function keys: function keys

Tags: Linux uptime8.13 "Linux learning is not difficult" Linux Common Operations Command (uptime): The command shows the time the system has been runninguse the Uptime command to show how long the system has been running, which in turn displays the following information: The current time, how long the system has been r

Linux Study Notes-Linux Private food based on laruence, learning notes private foodLinux Study Notes-Introduction to ARM and embedded Linux based on laruence's linux private dish ***** (1) Learn Basic bare metal programming: ARM7 or ARM9, understand the hardware architecture

execution mode) Some options are available with parametersShort options:-Multiple options can be combined:-a-b (separated by spaces) =-abLong options:--long options usually cannot be combinedParameters: The Action object of the command (where to take effect)Using Credentials: Verifying usersVirtual Terminal (terminal): Ctrl+alt+f1-f6Start Image interface: StartX CTRL+ALT+F1 can switch back F7 default is graphics (can be set)Right-click on the graphical interface to open the analog terminal fak

on the 386 machine, and that he was really just having fun, not wanting to make a plan as big as GNU! In addition, he hopes to get more people to build acial and feedback to develop this operating system! This concept is just the opposite of Minix. The news attracted a lot of attention, and they also went to the website provided by the Watts to download the core to install. Interestingly, because the directory of the FTP site where Torvalds placed the core is

Common Linux System administration commandsWhoAmI shows the user of the current operation, such as:650) this.width=650; "src=" Http://p3.pstatp.com/large/19210001778d80f7b8c8 "alt=" Linux Learning ~linux System Administration Command "style=" border:0px;vertical-align:middle;margin:0px auto;height:auto; "/>Hostname dis

passwordChage Detailed Password parametersUsermod Account TuningUserdel account removed-R along with the home directory deleteTemporarily do not start the account:/etc/shadow account expiration date (eighth field) is set to 0 can be used to make the account unusable"Find/-user username" After finding the archive one by one deleteAdd and remove groupsGroupadd Group NameGroupmod Group Parameter TuningGroupdel Removing a groupGPASSWD: Group Administrator featuresGPASSWD GroupNameAccount Management

use./var/log/: important To Not! This is the directory where the login file is placed! There are more important files such as/var/log/messages,/var/log/wtmp (record the information of the logged in) and so on./var/mail/: The directory where personal e-mail is placed, but this directory is also placed in the/var/spool/mail/directory! Usually the two directories are interlinked files!/var/run/: After some programs or services are started, their PID will be placed in this directory Oh! As for the

/tmp Common temporary file storage point/root system Administrator's home directory (hehe, privileged Class)The/MNT system provides this directory to allow users to temporarily mount other file systems./lost+found This directory is usually empty, the system is not properly shutdown and left "homeless" files (Windows is calledCHK) right here./proc a virtual directory, which is a mapping of system memory. This directory can be accessed directly to obtain system information./var overflow area for s

(see View to hidden files)-L is displayed in long format with only one display per line-I displays the file index node number (inode). An index node represents a file-T from near sort display by file modification time-D displays only the directory name, not the list of contents under the directory. Displays the symbolic link file itself without displaying the list of directories it points to-H to visually display file sizes-C LS default output with no parameters, multi-column displayExample: Ls

Learning from the chapters above, we have some knowledge of Linux, and now we are going to go on ....We are accustomed to the Windows interface System, as long as in the interface to go down the mouse, fill in and so on can be completed by a user create, delete, add belong to the group, and how we operate in Linux???Here are some other things to know when

It's hard to study embedded Linux. I will share my learning achievements with you in the next days. "Keep learning, don't be afraid" First, the basics of Linux Linux features: 1. Free Open Source 2. Portability and device platform independence 3. Powerful network functions 4

: Mount in the format: Mount-t file system type mount pointMount points can be set as needed.(1) Mounting floppy diskMount-t Msdos/dev/fd0/mnt/floppy(2) Mounting USB stickBefore mounting the USB flash drive, first confirm the USB device name, enter in command line: Dmesg|more to view, general device file is/DEV/SDA1, then set up mount point: Mkdir/mnt/usb, then mount:Mount-t Vfat/dev/sda1/mnt/usb(3) Mounting discsMount-t Iso9660/dev/hda/mnt/cdroom orMount/dev/cdrom/mnt/cdromMount the Mount comma

in and then execute the command, in practice every time this is cumbersome. You can write a script locally to execute the relevant commands in the script on the server.Confirm executionLet the program pause during execution, report some information, the user according to the information provided by the program to determine whether to allow the program to continue to do the following operations, this is the confirmation of execution. 123456789 #!/usr/bin/env bashecho-n"Do you wa

Learn about Linux with laruence-Summary of learning, Summary of laruence linux Throughout the entire process, I have learned a lot from "laruence's Linux private house dish-basic articles", from the basic understanding of Linux, to the understanding and operation of some fil

Bird Brother Linux Server Chapter learning SummaryDanbo Time: 2015-7-17The network mount (AUTOFS) mechanism is started by default at the Runlevel3 startup level, and we can turn it off by command: Chkconfig autofs off or/etc/init.d/autofs stop.Query start service on network listening: Netstat-lntup[Email protected] ~]# NETSTAT-LNUTPActive Internet connections (only servers)Proto recv-q send-q Local address