linux distributions list

1.What is Facl?Facl, the file system access control list, that is, the filesystem. Based on previous knowledge of the Linux permissions model, it is probably as follows:650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/2F/4E/wKioL1OfCQXjMb5aAADyJpA5D_Q227.jpg "title=" Facl " alt= "Wkiol1ofcqxjmb5aaadyjpa5d_q227.jpg"/>Let's say there's a scenario: The file that the user Tom created,

Happy Shrimphttp://blog.csdn.net/lights_joy/Welcome reprint, but please keep the author information when gdb loads the application and runs it, it detects the creation of the thread and notifies the SDMof the message as an event. Therefore, when an interrupt occurs,the SDM of VS will invoke our callback for each thread: Retrieves a list of the stack frames for this thread. We currently call into the process and get the frames. We might

#: Displays information about recent # timesLASTB:/var/log/btmp file that displays user error login attempts-N #: Displays information about recent # timesLastlog:Displays the last successful login information for each user;-U USERNAME: Displays recent login information for a specific userbasename:Gets the base name of the path$: Script path and name when executing script (reference script name)Example:basename/etc/passwd Mail:MailEnter a number to view a messageQ: ExitExample: (Send mail)Cat/e

changesWatermark/2/text/ahr0cdovl2jsb2cuy3nkbi5uzxqvy2f0b29w/font/5a6l5l2t/fontsize/400/fill/i0jbqkfcma==/dissolve/70 /gravity/center ">Third, execute the command: Setup, enter "firewall Configuration". In the SELinux bar, select Disable.Four, the execution command: Setenforce 0, (do not need to restart).Turn off SELinux protection for specified services (FTP as an example):1. Use command: Getsebool Ftpd_disable_trans be able to view the current state assumption is not on2. Input command: Setse

1. OverviewCentOS Execute simple Shell pin this report wrongCut:invalid byte, character or field listTry ' Cut--help ' for more information.2. CodeVim userid.sh#!/bin/bash#program# use ID, finger command to check the systemaccount's information. #History # Releasepath/+ LoganFirst =/bin: $PATHexport pathusers' :' -fl/etc/passwd) #注意这行!!!!!!!!!!!!! for inch ${users} Do ID ${username}done3. Problem solvingThe option followed by the Cut command in the code and the wrong parameter

Copying files from remote to local# SCP SCP [email Protected]:/root/zbdata/api-148.log-2014090412.bz2/root/zbdataReported Warning:permanently added (RSA) to the list of known hosts errorReason: When executing the SCP , the known_hosts file is not generated under the/root/.ssh of this machine . Solution:# Vi/etc/ssh/ssh_configThe last two lines areStricthostkeychecking NoUserknownhostsfile/dev/nullComment out these two lines and save the fileExecute

/test1.sh Set User Donggen have read and write permissions for/test/test1.sh files[Email protected] ~]# getfacl/test/test1.shGetfacl:removing leading '/' from absolute path names# file:test/test1.sh# Owner:root# Group:rootUser::rwxGroup::r-xOther::r-x[Email protected] ~]# setfacl-m u:donggen:rw/test/test1.sh[Email protected] ~]# GetfaclUsage:getfacl [-ACEESRLPTPNDVH] File ...Try ' Getfacl--help ' for more information.[Email protected] ~]# getfacl/test/test1.shGetfacl:removing leading '/' from ab

In the shell command terminal, CTRL + N equals the direction-down direction key, ctrl+p the direction key that corresponds to the direction.In the command terminal through them or the direction of the key can be used to achieve a quick search history commands. This is also a quick technique for entering commands.The ctrl+r enables quick retrieval of used historical commands in the command terminal. Ctrl+r R is the R in retrieve.CTRL + A: The cursor returns to the beginning of the command. (A:ahe

-up direction key. Ctrl+s: Make the Terminal daze, still, can make the terminal screen of the fast output stop.Ctrl+q: Exit Ctrl+s caused by Daze.CTRL + Z: Enables tasks that are running in the terminal, running in the background. (FG Recovery available)CTRL + C: Interrupts the task being performed in the terminal.Ctrl+d: You can exit the terminal in the case of an empty command line.Ctrl+[: Equivalent to the ESC key.ESC key: Displays all supported terminal commands 3 times in a row.Tab: command

#encoding: Utf-8#!/usr/local/bin/pythonFrom crontab import crontabImport Sys,reFrom Croniter import CroniterFrom datetime import datetimeImport socketImport FcntlImport structdef get_ip_address (ifname):s = socket.socket (socket.af_inet, socket. SOCK_DGRAM)Return Socket.inet_ntoa (Fcntl.ioctl (S.fileno (),0x8915, # SIOCGIFADDRStruct.pack (' 256s ', ifname[:15])) [20:24])If __name__== ' __main__ ':Cron=crontab (user= ' User0 ')Host=get_ip_address (' eth0 ')Html= ' html+= ' 'html+= ' For job in C