df unix

Let's face the reality: bad habits are hard to change. However, the habits you are already familiar with may be more difficult to overcome. Sometimes, you may have to review some things. I didn't expect it to do this! . In MichaelStutz's "10 habits of UNIX masters ", Let's face the reality: bad habits are hard to change. However, the habits you are already familiar with may be more difficult to overcome. Sometimes, you may encounter "Aha, I didn't exp

Linux/UNIX: Use the dd command to create a 1 GB binary How can I use Shell commands to create 1 GB or 10 Gb image files on UNIX, Linux, and BSD systems using dd commands? You can use the dd command to generate an image file to test the network or file system. Run the following command: Fallocate-Pre-allocate blank files; Truncate-reduce or expand the file size; Dd-convert and copy files, such as clonin

server. So I ran the following:chmod 0000 /downloadsRoot users still have access, while the LS and CD commands do not work. To restore it by:chmod 0755 /downloadsPassword-protect files in vimAfraid of the root user or someone else spying on your personal files? To try a password protection in vim, enter:Vim +x filenameAlternatively, use the: X command to encrypt your file before exiting Vim, and Vim will prompt you to enter a password.Clear garbled on the screenJust enter:ResetEasy-to-read form

The Unix tradition tends to delegate a task to a process, but within a task is not just a thread, like all members of a company, everyone is doing the same thing, everyone is only part of it, and when the grain size is reduced, everything can be done at the same time, anyway, Everyone also shares all the resources. So there is a thread. Threads are a different thread of shared resources. The semantics of threading are different from plain

Unix operating commands Pan lei, Institute of Theoretical Physics, Chinese Emy of Sciences Chapter 1 logon and exit Before you log on, you must first apply for a user registration name from the system administrator. No matter which computer the user logs on to itpnet, the user will access the same file system. 1.1 When a login prompt appears on the screen, you can enter your User Registration Name and press Enter. If you have a password

Article Title: solutions to password loss for various types of Unix and Linux. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. 1. How to Deal with the forgotten SolarisROOT Password 1. If you can log on with a common user, % df/etc, and confirm the device name that conta

Tags: construction development Source code large protection enthusiasts software direct no problemcollation from the network: http://blog.csdn.net/xiaojianpitt/article/details/6377419There are a lot of beginner Linux people who are concerned about the difference between Linux and Windows, and here is the difference between Linux Unix, it is clear that some differences can help us understand the operating system. Here's a description of the differences

Article Title: Unix and Linux Password loss solution. Linux is a technology channel of the IT lab in China. Includes basic categories such as desktop applications, Linux system management, kernel research, embedded systems, and open source. 　　1. How to Deal with the forgotten SolarisROOT Password 1. If you can log on with a common user, % df/etc, and confirm the device name that contains the/etc directory p

Getting started with C Programming in Unix/Linux (39) shell Command System Management, getting started with shellDf command This function is used to detect disk space usage and free space in a file system. It displays the usage of nodes and disk blocks in all file systems. The command format is as follows:Df [Option]Common Parameters and meanings are shown in the following table.Df-a: displays the disk usage of all file systems, including 0 block fi

n units;Example: 0 2 * * */test.sh > Output.file 2 > 1 Function: Redirect error output 2 to standard output 1, and then save standard output 1 to file output.file;Use: Open the following file and add the sample code above:9. Output redirect 2>1 In Bash, 0,1,2 represents Stdin_fileno,stdout_fileno,stderr_fileno, which is standard input, standard output, and standard error, respectively;For 2>1 , refers to redirecting standard error 2 to standard output 1. At this point, the in front of 1 is for

If you find that the created symbolic link cannot be deleted, you can only find that the file name cannot be suffixed with one/after the symbolic link is deleted /. For example:[WHB @ jcwkyl test] $ ln-S ~ WHB[WHB @ jcwkyl test] $ lsWHB[WHB @ jcwkyl test] $ rm whb/RM: cannot remove 'whb/': Not a directory[WHB @ jcwkyl test] $ Rm-f whb/RM: cannot remove 'whb/': Not a directory[WHB @ jcwkyl test] $ RM WHB[WHB @ jcwkyl test] $ ls Review the concepts of hard connection and symbolic connection:Each f

Classified communication of some LinuxUnix commands: ftp file transfer protocol login logs on to Unixmailx to read or send emails to rlogi Summarizes the usage of some Linux/Unix commands. Communication: Ftp file transfer protocol Login logs on to Unix Mailx reads or sends emails Rlogin logs on to remote Unix Write talk to other terminals Telnet to another system

is the core function. In fact, the principle is to call a tar command package compiled in windows through the command prompt cmd on Windows. The contents of this package are as follows: In fact, it uses the cygwin1.dll component to convert the tar command on UNIX to run on Windows. This package will be provided at the end of the article together with the tool and source code. We can see that we use the "cd" command in Compress. here we need to set t

1. FreeBSDFreeBSD 4.7 When the boot... 9 seconds command is displayed, press Input: boot-S After Login #/Sbin/Mount- # Passwd Enter the new password. FreeBSD 5 .* If you want to select start mode, Press 4 to enter single-user mode after logging on #/Sbin/Mount- # Passwd Enter the new password. Ii. Solaris How to handle Root Password forgetting 1. If you can log on with a common user, % DF/etc, and confirm the device name that contains the/etc directo

FreeBSD is an important branch of UNIX systems, and its commands are mostly common to Linux, and few of them are unique. 1:man online query man ls2:ls Viewing directories and Archives Ls-la3:ln creating a linked file ln-fs/usr/local/apache/etc/httpd.conf/etc/httpd.conf4:more page show more file names5:CD Switch Directory Cd/usr/local/apache6:mkdir creating a new directory Mkdir/usr/temp7:rmdir Deleting a directory rmdir/usr/temp8:RM Delete the dir

Are you looking for some high-quality Linux and UNIX tutorials? If so, this article will show you where to find these tutorials. Here we will give more than 30 fairly good tutorials on Linux and UNIX online.It should be noted that they are all in English, and perhaps some have been translated into the Chinese community, you can search. But anyway, my advice is to read English as much as possible.Beginner tr

' Export MAIL_DIR=/USERS/ROBIN/DBA_SCRIPTS/SENDEMAIL-V1. About Export mail_list=' [email protected] ' Export mail_fm=' [email protected] ' Tmpfile=/tmp/ck_fs_space.txt Alert=n #-------------------------------- # Check The parameter #-------------------------------- max=$1 if [! ${2}]; then echo "No filesystems specified." echo "Usage:ck_fs_space.sh//u01" Exit 1 Fi #-------------------------------- # Start to check the disk space #-----------------

Many programming friends of Chen Hao asked me a few questions online. how do I learn Unix? How is Unix so difficult? How can we learn well? And let me give them some experience in learning Unix. Most of the time, I found that friends who asked these questions have two characteristics: 1) fear of Unix and lack of confid

Finally, I am free to sort out my Unix/Linux technologies over the years. I will first begin with a Linux installation document to write training documents for the company. By the way, I will also post it to my blog and share it with you, in return for the guidance and support from previous teachers and predecessors, I will share with you all the time ,... Finally, I am free to sort out my Unix/Linux techno

1. How to Deal with the forgotten SolarisROOT Password 1. If you can log on with a common user, % df/etc, and confirm the device name that contains the/etc directory partition. % Df/etc// Dev/dsk/c0t0d0s0... In this example, It is c0t0d0s0. If your root directory partition device is different, replace it with one. 2. Insert the system disk into the cdrom. 3. After a prompt appears, use the