Cloud Applications

Working Principle of sort command note 01sort: compare each line of the file as a unit and compare each other. the comparison principle is to compare the lines following the first character by ASCII code, finally, output the result in ascending

Currently, Ubuntu has become an important Server platform. users mainly use Ubuntu to execute general tasks such as websites, databases, archives, printing, and email servers, some users also use Ubuntu as a security, backup, and firewall... ubuntu

The chmod command differs from the umask command to change the access permission of the file directory. it is a very heavy system command. You can use it to control access to files or directories. Umask is a default permission for creating a file or

Bash-shell startup file Linux uses environment variables to identify itself in programs and scripts. This provides a simple way for your program to obtain system information. The question is how to set these variables. When you log on to the Linux

Tcpdump is a powerful protocol layer analysis tool in linux. it can be used to monitor network communication and locate network-related bugs. for example: whether a connection is created between the client and the server, the client sends a message,

SSH command line upload/download file upload: scp/path/file (local path) user (remote target user name) @ host (remote target IP address ): /pathorfile (file storage path) Download: scpuser (remote user name) @ host (remote IP):/path/file (download..

Ubuntuusb wireless network card can not connect to the problem of disconnection 1. view their own usb network card Java code lsusb2. download driver I found this is RTL8188CUS802.11nWLAN to the official website Download:

How to use QQ in linux QQ after N years has recently returned to my life, but now I have switched to linux, so how to use QQ has become a problem. The initial test was pidgin + lwqq. after several days, I found that there was a message loss. I guess

Modify the ftp upload path [root @ localhostlocal] # chownftpftpdirectory/[root @ localhostlocal] # chgr ftpftpdirectory/[root @ localhostlocal] # chmod755ftpdirectory/[root @ localhostlocal] # Modify the ftp upload path [root @ localhost local] #

Solution E: EncounteredasectionwithnoPackage: header error: the following error occurs on my ubuntu machine. Readingpackagelists... Error! E: EncounteredasectionwithnoPackage: headerE: Proble... Solution E: Encountered a section with no Package:

It is necessary to burn two iso images to a dvd disc to make the system boot disk UltraISO. if you only store data, copy and paste the files after loading the file with a virtual optical drive; if you want to create a system disk, it will be a

Linux General automatic log cleanup script 1. this article is a simplified script for automatic system deployment. The main function is to clear logs from all directories. based on the given log directory, the deletion time is combined with crontab

An example of suse kernel BUG: update_group_power: cpu_power introduction: Recently, five business servers have been down for three days. The reason is that the suse11sp1 kernel bug. System error message: system messages log error: Jun1014: 00:

Apachesvn403forbidden always prompts that you do not have access permissions. when using apache and svn integration, access is always denied and you do not have access permissions. In fact, these are not your mistakes, the error is that the

SVN file library migration company used SVN installed in windows2003 for more than a year. now we feel it is very slow and we strongly demand to change it to a linux platform. Installing subversion in linux is quite simple, so I won't say much about

Establish a Wi-Fi hotspot in ubuntu. run more/proc/sys/net/ipv4/ip_forward to check whether the file is 1. if not, run sudoecho & quot; 1 & quot; & gt; /proc/sys/net/ipv4/ip_forward2. configure your wireless link to create a wireless link step 1 ,...

Linux file permission. the chmod permission symbol indicates the meaning of the number r File: readable path: can only read the path structure List 4 W File: writable path: you can add, delete, and move 2x files in a path: executable path: enter

Ubuntuapachefastcgi virtual host installation 1cp/etc/apache2/sites-available/default/etc/apache2/sites-available/www.domain.com here www.domain.com is the virtual host configuration file (of course, the file name can be) 2. Edit this configuration..

Parsing loginshell and no-loginshellloginshell: The Complete logon process is required for obtaining bash, which is called loginshell. For example, tty1 ~ When logging on to tty6, you need to enter the user name and password. the obtained bash is

Special Linux permissions: SUID, SGID, SBITSUID: only valid for the binary program performer requires the x permission for the program. during the process of running the program, the performer has the permissions of the program owner. for example: A