installation management command

/System_Administrators_Guide/ch-Services_and_Daemons.htmlComparison table, taking apache/httpd as an example Task Old instructions New directives Enable a service to start automatically Chkconfig--level 3 httpd on systemctl enable httpd.service Make a service not start automatically Chkconfig--level 3 httpd off systemctldisablehttpd.service Check Service status Service httpd Status systemctlstatushttp

Linux User Management, USER command creation, and linux User Management Create USER commands Useradd [specify user uid] [specify user group] [user name] The uid and the group can be created successfully without writing, but the system automatically creates a group with the same name. When creating a user, you can also specify the home directory and whethe

Command name: chmodCommand English Original: Change the permissions mode of a fileCommand path:/bin/chmodSyntax: chmod "{ugoa}{+-=}{rwx}" "File or directory""mode = 777" "File or directory"-R Recursive modificationFunction Description: Change the permissions of a file or directoryThe number represented by the permissionR 4W 2X 1rwxrw-r-7 6 4Examplechmod g+w TstfileGrant Write permission to tstfile fileChmod-r 7777 TestfileModify directory Testfile and

(1388) ─┬─HALD-ADDON-ACPI (1431) the│└─hald-addon-inpu (1416) -├─master (1558) ─┬─pickup (2256) -│└─qmgr (1572) -├─mcelog (1470) +├─mingetty (1630) -├─mingetty (1632) +├─mingetty (1634) A├─mingetty (1636) at├─mingetty (1638) -├─mingetty (1644) -├─RPC.IDMAPD (1241) -├─RPC.STATD (1209) -├─rpcbind (1191) -├─RSYSLOGD (1149) ─┬─{rsyslogd} (1150) in│├─{RSYSLOGD} (1152) -│└─{RSYSLOGD} (1153) to├─sshd (1482) ─┬─sshd (1647) ───bash (1652) ───pstree (2649) +│└─sshd (2585) ───sshd (2589) ───bash (2590) -└

the AT–C task IDAbove, only the most core information is displayed, you can see our command is LL.The time format of the AT command can beMinute??? At now + 5 minutes?? The task runs after 5 minutesHour????? At now + 1 hour????? The task runs after 1 hoursDays????? At now + 3 days????? The task runs after 3 daysWeeks???? At now + 2 weeks???? The task runs after two weeksFixed???? At midnight????????? Task

3 Source Package Management3.1 the difference between the source package and the RPM package(1) Difference: ① difference before installation: conceptual difference; ② after installation: different installation locations(2) default installation location for RPM packages RPM Package Default

specified directory, starting at the root directory, and adding the directory name /, the subdirectory in the current directory can write the name directly; relative path: The path starting at the current position Example 3 : CD- : Returns the directory where it was before entering this directory[Email protected] httpd]# cd/usr/share/yum-[Email protected] httpd]# cd/usr/share/yum-plugins/[Email protected] yum-plugins]# CD-/var/log/httpd[Email protected] httpd]# CD-/usr/share/yum-plugins[Email p

]~]#mkdir-pv/tmp/mylinux/{usr/local/{bin,sbin},etc/{sysconfig, init.d},bin,sbin}mkdir:createddirectory ' Mylinux ' mkdir:createddirectory ' Mylinux/usr ' mkdir:createddirectory ' mylinux/usr/local ' mkdir:createddirectory ' Mylinux/usr/local/bin ' mkdir:createddirectory ' Mylinux/usr/local/sbin ' mkdir:created directory ' mylinux/etc ' mkdir:createddirectory ' mylinux/etc/sysconfig ' mkdir:created directory ' mylinux/etc/init.d ' mkdir:createddirectory ' Mylinux/bin ' mkdir:created directory ' M

output the following with the Ls-l command: Although the file is also cut in bytes, but the-C parameter will try to maintain the integrity of each line, that is, a row has 13 bytes, then it will be cut into two files, a 10 byte, a 3 byte, and the-B parameter will accumulate 8 bytes to the next line to fill 10 bytes and then cut, so-b parameter only 7 files, The-c parameter has 10 files. Copyright NOTICE: This article for Bo Master original

specified directory, starting from the root directory name plus/, the current directory of subdirectories directly write the name; relative path: The path starting at the current positionExample 3 : CD- : Returns the directory where it was before entering this directory[Email protected] httpd]# cd/usr/share/yum-[Email protected] httpd]# cd/usr/share/yum-plugins/[Email protected] yum-plugins]# CD-/var/log/httpd[Email protected] httpd]# CD-/usr/share/yum-plugins[Email protected] yum-plugins]#Exam

Linux/unix DD command is a very good management disk command DD Command function: A block of a specified size copies a file and, at the same time as a copy, a specified conversion, playing the role of an initialization disk 1. Introduction to the Order Main options for DD: The place where the number is specified is

full name of the package is still duplicated and that the full name of the package needs to be apr-util-1.3.9-3.e16_0.1 by pressing two times.After the cursor is in the input "x" (Press the TAB key once) Enter to continue the installationNote that the first dependency libapr-1.so.0 is a library file (or module) that needs to be opened Http://www.rpmfind.net search for the first fileFind the full name of the installation package corresponding to the L