Linux

Zip:Zip [file name after compression] [source file] Zip compression-R compression directory (not packaged, each of the files becomes a zip)Unzip [file or directory] Zip decompressionGzgzip [source file] The source file disappears after compressing-C

/root directory/bin command Save directory (normal user available)/boot Directory/dev Device files/etc configuration file/home directory for ordinary users/lib System Library/MNT System Mount/media Mount/root Super User home Directory/tmp Temp

If your iptables basic knowledge is not yet known, it is recommended to take a look first.Start ConfigurationLet's configure a firewall for the filter table.(1) Check the setting of this institution in Iptables[email protected] ~]# iptables-l-NChain

A scheduling algorithm called CFS (completely-fair-scheduler) used in Linux kernel. The description found on the internet is not intuitive and difficult to read. But found a very easy-to-understand (Avenue to Jane Ah ...)

#cd/etc/inittab The last line that is not changed to comment is the start level setting line. init 0 means shutdown (do not set this level, or the system will not come up)init 1 Single user modeInit 2 Command-line modeInit 3 command-line network

Batch file name modification in LinuxSometimes we have a directory. The following file names need to be re-orderedFor example: The following 10 students completed the script, now need to change the finish to ing[[email protected] test]# Touch

Linux generates a random methodMethod of taking 8-digit number[Email protected] scripts]# echo $RANDOM 12465[[email protected] scripts]# echo $ ((random+10000000)) 10023190[Email protected] scripts]# echo $RANDOM | md5sum | Cut-c 1-8ae74cedb[Email

1. Introduction to Commands More (more) The command displays one screen of text at a time, stops after full screen, and a hint appears at the bottom of the screen, giving a percentage of the file that has been shown so far, which is convenient to

The/etc/default/useradd file is a default configuration file that needs to be called when you use Useradd to add a user, and you can use the "useradd-d parameter" format to modify the contents of the file.[Email protected] ~]#

The meaning of the Linux top command virt,res,shr,dataVirt:virtual Memory usage Virtual RAM1. The process "required" virtual memory size, including the library, code, data, etc. used by the process2, if the process to apply for 100m of memory, but

Linux network card changed from eth0 to eth1, how to repair   use WMware installed Linux, after the successful installation, the use of the network card is eth0, no eth1. But after a period of time, do not know why eth0 can not be used, the system

First look at a simple makefile, we put it in the directory/boot, can be used to compile boot.bin and loader.bin.# Makefile for boot# Programs, flags, etc. asm= nasmasmflags=-I include/# this programtarget= boot.bin loader.bin# all phony

This article records the Linux file typesI. Types of files1, ordinary files, regular file, "-": such as data files, executable files, etc.2. catalog files, directory file, "D": the Essence of the directory in Linux is the file, path map, which

In the Linux system, NL, Cat, TAC and other commands, all at once to display the data on the screen, more commands can be a page by page flipping reading. You can also view the contents of a file by page, and also support functions such as jumping

One, for example:-rw-r--r--. 1 root root 129 Dec TCSHRCWith:1.-rw-r--r--: File type and Permissions (total 10 fields)1.1: The first field represents the file type: "-" for the archives; "D" for the Directory; " L "is a connection file (similar to a

. tar unpacking: Tar zxvf Filename.tar Package: Tar czvf filename.tar DirName--------------------------------------------- . gz Decompression 1:gunzip filename.gzDecompression 2:gzip-d filename.gz Compression: gzip FileName . tar.gz and.

1. System Management class command     shutdown [option]  time        -r:  Restart          -h:  shut down         -c:  cancel restart shutdown command          2. Time Format     now        +#  : #分钟以后 DATEDATEMMDDHHMM[CC]

Linux kernel preemption mechanism-Overview This article focuses on the implementation of Preemption in Linux kernel scheduler. The general operating system, x86 processor, and hardware concepts involved may also apply to other operating systems.1.

Shell notes, old boy shell notes #! /Bin/bashvar2 = 'var2' echo $ var2echo $ {var2} var2 = 'var2 _ 1' # The variable can be defined repeatedly, but $ var3 = 'var3' readonly is not added before the variable name. var3 # declare var3 as a read-only

LinuxCentOS6.5 install Oracle11g -- dummies The installation of Oracle11g twice in CentOS6.5 of linux is successful, and the installation process is relatively cumbersome. The following is a detailed record.Before installation, read: 1. A fixed IP