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- Want to become a Linux master? Full analysis of mkdir, cat, touch command syntax and examples
- Directory mkdir command sentence pattern command format command function command parameter mkdir command example Example 1: Create an empty directory Example 2: Create multiple directories recursively Example 3: Create a directory with permissions 777 Example 4: Create a new directory and display information Example 5: Directory structure of a project created by a command cat command sentence pattern command format command function command parameter cat command example Example 1: Add the line number to the file content of log2012.log and enter log2013.log into the file Example 2: Add log2012.log and log2013 Add the line number to the .log file content (blank lines are not added) and then append the content to log.log. Example 3: Use heredoc to create files in the next life
- LINUX 664 2024-06-13 19:58:44
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- Teach you Tomcat URL rewriting
- Preparation for the early installation of JDKyuminstalljava-1.8.0-openjdk-develvim/etc/profile.d/jdk.shexportJAVA_HOME=/usr/java/latest#First define the environment variable of JAVA_HOME exportPATH=$JAVA_HOME/bin:$PATH#and then append./ etc/profile.d/jdk.sh install tomcatyuminstalltomcattomcat-admin-webapps.noarch\tomcat-webapps.noarcht
- LINUX 859 2024-06-13 19:29:03
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- cronatab periodic task scheduler
- To perform periodic tasks, ensure that the service is running. The service name is crond; servicecrondstart; systemctlstartcrond; configuration file /etc/crontabcron’s log file cat/var/log/cron Introduction crond is a daemon process in Linux that is used to periodically perform certain tasks or wait for certain events. Similar to the scheduled tasks under Windows, when the operating system is installed, this service tool will be installed by default, and the crond process will be automatically started. The crond process will regularly check whether there are tasks to be executed every minute. If there are tasks to be executed, The task will be executed automatically. Task adjustment
- LINUX 529 2024-06-13 18:49:11
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- Help you understand the Linux operating system
- 1. What is an operating system? An operating system (OS for short) is a computer program that manages and controls computer hardware and software resources. It is the most basic system software that runs directly on the "bare metal". Any other software must be in the operating system. It can only be run with the support of . Shangxuetang knowledge compilation: Linux operating system introduces operating system: kernel, library, application. Library: An application without an execution entry point. windows system: dll file. linux: so: shardedobject2. Operating system in real life win7MacAndroidiOS3. Development history of operating system Unix Before 1965, computers were not as sophisticated as they are now.
- LINUX 1151 2024-06-13 12:52:46
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- Get to know Linux: a free, stable and high-performance operating system
- Regarding Linux, its basic concepts should be familiar to you. The official definition: Linux is a set of Unix-like operating systems that are free to use and freely disseminated. It is a multi-user, multi-task, multi-threading and multi-CPU operating system based on POSIX and UNIX. It can run major UNIX software tools, applications and network contracts. It supports 32-bit and 64-bit hardware. Linux inherits the network-centric design philosophy of Unix and is a multi-user network operating system with stable performance. Why use Linux? What is the value of Linux? The main advantages of Linux are stability, freeness, and good performance. Stability, where is it manifested? We use PCs not only for some special cases
- LINUX 1260 2024-06-12 22:46:51
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- Linux shell and process
- Run a few commands here: print the login process (always exists until login and exit) IDgeorge.guo@ls:~$echo$PPID3411george.guo@ls:~$ps-aux|grep3411george.+34110.00.0990044520?S11: 000:00sshd:george.guo@pts/46 Print the shell process forked out by the login process (always exists until login and exit) george.guo@ls:~$echo$$3412george.guo@ls:~$ps-aux |grep3412george.+
- LINUX 974 2024-06-12 22:46:30
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- Tutorial on using useradd and passwd commands in Linux system
- #useradd–d/usr/sam-msam This command creates a user sam. The -d and -m options are used to form a home directory /usr/sam for the login name sam (/usr is the default user directory. parent directory). Assume that the current user is sam, then the following command changes the user's own password: #passwdOldpassword:******Newpassword:*******Re-enternewpassword:**********if it is super User, you can specify a password for any user using: #passwdsamNewpassword:*******Re-en
- LINUX 894 2024-06-12 22:36:26
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- Master Linux must-learn commands: how to use fidsk and practical examples
- Preface: Let me write an article to share with you a command that must be learned under Linux: fidsk. If you don’t have a Linux environment, you can refer to my previous article: Oops, I suddenly want to get a Linux centos8 system to play with, what should I do? Introduction Linuxfdisk is a program that creates and maintains partition tables. It is compatible with DOS-type partition tables, BSD or SUN-type c drive lists. Usually we use it to manage the Linux c drive, perform partition viewing, Linux 64-bit system, low format and other operations. It is one of the must-learn commands for contacting Linux. Sentence pattern fdisk [required parameters] [selected parameters] required parameters: selected parameters: menu operation instructions running environment before the demonstration instance
- LINUX 1171 2024-06-12 19:02:41
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- No need to move media! How to directly boot and install a Linux system from the hard disk
- When I was messing around with Linux booting today, I discovered a Linux installation method that does not require any Unicom media, that is, starting the installation system directly from the hard disk. 1. First download an easyBCD. Go to the "Add New Entry" option and select the "NeoGrub" entry, then select "Add". Add and click "Configure". 2. Add the following lines of text to the pop-up text file named "menu.lst": titleInstallUbunturoot(hd0,1)kernel(hd0,1)/vmlinuzboot=casperiso-scan/filename=/[LINUX]ubuntu-12.10 -deskt
- LINUX 416 2024-06-12 18:29:02
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- The principle and usage of ll command to view directory information list in Linux
- Study and summarize the document by yourself, it’s a bit messy, don’t blame it 1. What does the total dosage in Linux mean? In Linux, we often use the ll command (ls-l) to view the directory information list, see the picture on the right: In the picture above, "Total dosage" What does 92" refer to? The "total" here, which can also be called "total dosage" or "total", refers to the number of blocks used in the directory. How is this number of blocks estimated? See the picture on the right: The value on the right side of the picture above is the sum of the number of blocks (number of blocks) occupied by directories and files, 4x8+40+12+8=92, which is equal to "total 92", among which, the "ll-s" command It can also be written as "ls-ls" or "ls-l--size", using "ls--h
- LINUX 958 2024-06-12 10:27:59
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- Learn about Linux: a highly secure, highly available, and easy-to-maintain operating system
- What is Linux? Linux is an operating system software. Unlike Windows, Linux is a Unix-like operating system that is open source and can be spread freely. It is an operating system that supports multi-users, multi-tasks, multi-threads and multi-CPUs. It can run major UNIX software tools, applications and network contracts. It supports 32-bit and 64-bit hardware. Linux inherits the network-centric design philosophy of Unix and is a multi-user network operating system with stable performance. Advantages of Linux: 1. High security - Unless the user logs in as root under the Linux system, it is difficult for the program to modify the system settings and configuration. To do this, the permissions of the downloaded file/malware
- LINUX 429 2024-06-11 13:35:01
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- Detailed explanation of high-precision time function and timeout mechanism under Linux
- High-precision time acquisition and timer under Linux
- LINUX 756 2024-06-11 09:06:58
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- Detailed explanation of haproxy
- 1. Install haproxy. CentOS comes with haproxy, but the version may be older. The latest stable version of haproxy can be found on the IUS repository. cat
- LINUX 661 2024-06-10 11:43:58
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- Detailed explanation of the steps and methods to set Linux disk quota
- In the following blog posts, we will introduce the installation of the samba service and change the configuration file to set up the samba service. But in Windows, you can manage the file server through the C drive quota. In Linux, you can also set the C drive quota to manage the file server. Linux data recovery is easier and simpler to configure. Let’s briefly explain the basic steps of C drive quota first, so that the subsequent explanation will be easier to understand. 1. Check whether the software package is installed. 2. Edit the file system file 3. Restart the computer 4. Generate c drive quota file 5. Create c drive quota for users or groups 6. Start c drive quota There are many steps to configure Linux user disk quota, but you can see what you really need to do It’s nothing more than 2.3 steps, so
- LINUX 453 2024-06-09 22:59:26
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- Linux tar usage introduction
- First, we need to understand two concepts: packaging and compression. Packaging refers to turning a large number of files or directories into a total file; compression means turning a large file into a small file through some compression algorithms. Why should we distinguish these two concepts? This is due to the fact that many compression programs in Linux can only compress one file, so when you want to compress a large number of files, you have to first package the large number of files into a package (tar command), and then use Compression program (gzipbzip2 command). Syntax tar (option) (parameter) option -A or --catenate: add files to the existing backup file; -B: set the block size; -c or --create: create a new backup file; -C: this
- LINUX 1218 2024-06-09 20:55:34
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