Linux

First download the binary file on the official web http://www.erlang.org/download/otp_src_R15B.tar.gzand upload it to the Linux mainframe.Extract: Gunzip-c otp_src_R15B.tar.gz | Tar XF-CD otp_src_r15b ./configure--prefix=/home/erlang You will then

Turn from: http://blog.chinaunix.net/uid-8695538-id-2017739.html It is literally understandable for a file, but for a directory, the execution permissions represent what. How does it differ from read and write permissions? Do some small experiments

Eth0 No, the representative did not configure gateways and IP information I am a Linux redhat9 customized version of the virtual machine VMware Workstation, with both a server side and a graphical interface Graphical interface Menu >> system

1. grepBrief introduction 　　 grep(The global Search Regular expression (RE) and print out of the line, which searches for regular expressions and prints the rows) is a powerful text search tool that uses regular expressions to search for text

View the current level of catalog file size Du-h--max-depth=1 View all file sizes for the current directory Du-sh Du-k--max-depth=1 Display in kilobytes A few commonly used parameters 1.–max-depth= beyond the specified number of layers,

Launch Tomcat times java.net.unknownhostException exception under Linux, known as the Struts DTD validation issue, and if someone encounters such a problem, refer to the following solution: Without networking The case started Tomcat happened

When using the command line, there is a lot of time to find the files you need, such as LS found. S H e l L provides a complete set of string pattern matching rules, or as a meta character, when S H e l L encounters these characters, they are

Because the modification of a configuration file, causing the system to start a service when hold live, the system can not start up. In this case, often by modifying the table start level, switch to Xwindow mode restart, generally choose the startup

Linux Col CommandFunction Description: Filter control characters.Syntax: Col [-bfx][-lSupplemental Note: In many UNIX documentation, there are RLF control characters. When we use the Shell special character ">" and ">>", the content of the

Sometimes we often need to log on to a remote server to run some programs, if these programs need to run for a long time (a few hours), and the program runs a network failure, or a client failure, then the client and remote server link will be

1. View Log common commands tail:-n is the display line number; the equivalent of the NL command; tail-100f test.log Real-time monitoring of 100-line logs Tail-n test.log Query Log The last 10 lines of the tail; Tail-n +10 test.log to query all logs

awk Profiling file 1, the default per line by Space or tab segmentation, output text of 1, 4 awk ' {print $1,$4} ' Log.txt 2, specify split character ' comma ', output text of 1, 4 items awk-f, ' {print $1,$4} ' Log.txt 3, Set Variable awk-

Turn from: http://os.51cto.com/art/201108/285239.htm Ubuntu11.04 is the 14th release version of Ubuntu system. Ubuntu11.04 will support multi-touch technology, improve the user interface, better support hardware devices, and compatible arm

First, look at Man tar: NAMETar-the GNU version of the tape archiver (TAR) utility Synopsis Tar [Options] Operations:[-] A--catenate--concatenate[-]c--create (packaged files)[-]d--diff--compare[-]r--append (Append)[-]t--list (listed)[-]u--update

The initrd.img in the 2.6 kernel is cpio compressed and is no longer a ext2 format used by the 2.4 kernel and cannot be mounted using the Mount-o loop. Need to decompress with gunzip and then use Cpio to unpack Cp/boot/initrd-***.img initrd.img.gz

modification of Linux environment variables (permanent, temporary) Linux modifies environment variables, simple but important One, the type of Linux variable According to the life cycle of variables, Linux variables can be divided into two

1, usually this happens when the operation is done through the SU root command. Su or SU root is just the equivalent of the root user to operate, the actual system environment does not switch to the root user environment, but only the current logged-

On their own machines installed virtual machine, and then installed on the above Oracle 11g, after the database installed, Sqlplus not run up, prompted no permissions, so disabled the SELinux, but the restart system error: Unable to load SELinux

First: Download, extract MongoDB files. Put the extracted files under the/opt/(storage directory to install their own habit of storing) # wget Http://fastdl.mongodb.org/linux/mongodb-linux-x86_64-2.0.4.tgz # tar-zxvfmongodb-linux-x86_64-2.0.4.tgz #

Note: This blog finally did not build a successful OpenCV in Linux, please go: http://blog.csdn.net/tanhngbo/article/details/40403885 To see a successful build. In addition, here is the success in Windows built in the effect: