Linux

Compression and decompression1 gzipGzip test.py #压缩后为test. py.gzgzip-d test.py.gz #解压文件2 bzip2Bzip2 test.py #压缩后为test. py.bz2bzip2-d test.py.gz #解压文件3 tarOptions content-C Create a packaged file-R append file to packaged document-T list packaged

Grep:the Three Musketeers of text processing on Linux1 grep: Text filter (Pattern: pattern) tool; *(grep, Egrep, Fgrep)2sed:stream Editor, text Editing tool;3 awk:linux implementation gawk, Text Report Generator;Grep:global search REgular expression

1. Installing Erlang1) Enable EPEL on your machineExecute the following two lines of command as rootSu-c ' RPM-UVH http://download.fedoraproject.org/pub/epel/6/i386/epel-release-6-8.noarch.rpm 'Su-c ' yum install foo '2) Enableerlang

1. Create a partitionCheck to see if an unpartitioned hard disk exists# fdisk-l650) this.width=650; "Src=" http://note.youdao.com/yws/public/resource/7cab2b25f7845268da528679eea1885b/xmlnote/ 8bc7622684204302a80b7c7d820d4ee0/1418 "style="

First, prepare①, installing VMwareThe installation steps are omitted. The version I use here is as follows:②, Linux system image file:It is recommended to use the latest version of the Linux system. Some components require a higher version of the

A brief introduction to Linux and the introduction of common commandsThis note takes the Ubuntu system as an exampleUbuntu system installation Self-Baidu, or reference http://www.cnblogs.com/CoderJYF/p/6091068.htmlSelf-installingIntroduction to

W who whoami last Lastb lastlog basename sleep hostname mail################################################W.H.O.WhoAmILast: Displays the/var/log/wtmp file, showing the user login history and System restart historyLastb:/var/log/btmp file that

System failure RecoveryOne:7.0 The boot level after the/usr/lib/systemd/system/******.target/etc/systemd/system/default.target can be changed by linking to the start levelIf/etc/systemd/system/default.target is removed and the/usr/lib/systemd/system/

A file is opened or there may not be a file descriptor, such as current working diretories,memory mapped files and executable text files; losf can check the number of files opened by a process:[Email protected] ~]# Shsh-4.1# lsof |grep1407Rpcbind1407

Linux Kernel official website Cgit tool does not support patch search by change code, think of one way is to catch the patch down, so that you can search locally. It took 2 hours to write a gadget, not much to say, to look directly at the effect:

Introduce the installation and use of Terminator virtual terminal650) this.width=650; "src=" Http://s4.51cto.com/wyfs02/M01/8A/77/wKioL1gxttjQAx_AAABhyAolaV0888.png "title=" Screenshot-2.png "alt=" Wkiol1gxttjqax_aaabhyaolav0888.png

from:http://blog.csdn.net/jasonliuvip/article/details/22600569Linux Network Programming IX: Splice function, efficient 0 copiesRecently looking at "Linux High Performance Server Programming", here to do a diary to motivate themselves, while sharing

Basic format:* * * * * commandTime-sharing Weekly commandThe 1th column represents minutes 1~59 per minute with * or */1The 2nd column represents the hour 1~23 (0 means 0 points)The 3rd column represents the date 1~31The 4th column represents the

Preface: The previous article briefly introduces the concepts of backup and recovery for Linux systems, followed by a previous article on two commonly used backup and restore commands.1 Common Backup commandsBefore you introduce the backup RESTORE

First, the application scenarioIn small and medium enterprises, the company's different operations and maintenance personnel are basically the root account of the server login management, lack of account authority audit system. No problem OK, out of

For those who have just come into contact, will certainly give Linux a large pile of various filenames to stun. Don't say, just for example, we know that the most common compressed files under Windows are only two, one is zip, the other is. rar. But

The previous day learned that the at command is for routine scheduled tasks that run only once, and that the Linux system is controlled by the cron (Crond) system service. Linux systems have a lot of planned work on them, so this system service is

Several CPUsMore/proc/cpuinfo |grep "Physical ID" |uniq|wc-lEach CPU is a few cores (assuming the same CPU configuration)More/proc/cpuinfo |grep "Physical id" |grep "0" |wc-lCat/proc/cpuinfo | grep processor1. View the number of physical

Practice a1, create a 1G partition, the file system is EXT4, the volume is labeled MyData, the block size is 1024, the reserved management space for the disk3% of the partition requires that the brake be mounted to the/data directory, and

Machine Room operation error caused the rack or host power down is the occasional thing, then how in this case, let the Ceph service with the OS startup and fast start? Here is a simple method:Execute the following command on the OSD host:sudo