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    安装VIM所依赖包

    CentOS6.3 x86_64 最小化安装版安装vim yum -y install vim 通过这个命令可得出安装vim所得依赖包如下 Transaction Summary ============================================================================================================================================================= Install       9 Package(s) Total download size: 18 M Installed size: 54 M Downloading Packages: Setting up and reading Presto delta metadata Processing delta metadata Package(s) data still to download: 18 M (1/9): gpm-libs-1.20.6-12.el6.x86_64.rpm                                                                                              |  28 kB     00:00      (2/9): perl-5.10.1-127.el6.x86_64.rpm                                                                                                 |  10 MB     00:41      (3/9): perl-Module-Pluggable-3.90-127.el6.x86_64.rpm                                                                                  |  38 kB     00:00      (4/9): perl-Pod-Escapes-1.04-127.el6.x86_64.rpm                                                                                       |  30 kB     00:00      (5/9): perl-Pod-Simple-3.13-127.el6.x86_64.rpm                                                                                        | 210 kB     00:00      (6/9): perl-libs-5.10.1-127.el6.x86_64.rpm                                                                                            | 576 kB     00:02      (7/9): perl-version-0.77-127.el6.x86_64.rpm                                                                                           |  49 kB     00:00      (8/9): vim-common-7.2.411-1.8.el6.x86_64.rpm                                                                                          | 6.0 MB     00:23      (9/9): vim-enhanced-7.2.411-1.8.el6.x86_64.rpm                                                                                        | 892 kB     00:03      ---------------------------------------------------------------------------------------------------------------------------

    02

    内存逃逸

    程序占用的内存可以分为栈区、堆区、静态区、文字常量区和程序代码区。占用的栈区由编译器自动分配释放,程序员不用关心管理问题。堆区的内容一般由需要程序员手动管理,手动申请和释放。例如C/C++语言,调用malloc在堆上可以分配一块内存,释放需要调用free或delete操作。如果申请后没有释放就会导致严重内存泄露问题,这在实际开发的产品中是不允许的。所以对堆上内存的申请和释放要非常小心。但是在Go语言中,我们并不需要非常关心一个对象到底是申请在栈上还是堆上,因为Go的编译器会确定对象的真正分配位置,如果一个变量或对象需要分配在堆上时,会自动将其分配在堆上而不是栈上,使用new创建的对象也不一定是分配在堆上。堆和栈的界限变得比较模糊,Go采用逃逸分析技术确定一个对象是分配在堆上还是栈上。

    02

    Install Jumpserver4

    --> Processing Dependency: kernel-headers >= 2.2.1 for package: glibc-headers-2.17-222.el7.x86_64--> Processing Dependency: kernel-headers for package: glibc-headers-2.17-222.el7.x86_64---> Package keyutils-libs-devel.x86_64 0:1.5.8-3.el7 will be installed---> Package libcom_err-devel.x86_64 0:1.42.9-12.el7_5 will be installed--> Processing Dependency: libcom_err(x86-64) = 1.42.9-12.el7_5 for package: libcom_err-devel-1.42.9-12.el7_5.x86_64---> Package libkadm5.x86_64 0:1.15.1-19.el7 will be installed---> Package libselinux-devel.x86_64 0:2.5-12.el7 will be installed--> Processing Dependency: libsepol-devel(x86-64) >= 2.5-6 for package: libselinux-devel-2.5-12.el7.x86_64--> Processing Dependency: pkgconfig(libsepol) for package: libselinux-devel-2.5-12.el7.x86_64--> Processing Dependency: pkgconfig(libpcre) for package: libselinux-devel-2.5-12.el7.x86_64---> Package libverto-devel.x86_64 0:0.2.5-4.el7 will be installed---> Package m4.x86_64 0:1.4.16-10.el7 will be installed---> Package perl-Data-Dumper.x86_64 0:2.145-3.el7 will be installed---> Package perl-Filter.x86_64 0:1.49-3.el7 will be installed---> Package perl-Pod-Simple.noarch 1:3.28-4.el7 will be installed--> Processing Dependency: perl(Pod::Escapes) >= 1.04 for package: 1:perl-Pod-Simple-3.28-4.el7.noarch--> Processing Dependency: perl(Encode) for package: 1:perl-Pod-Simple-3.28-4.el7.noarch---> Package perl-Pod-Usage.noarch 0:1.63-3.el7 will be installed--> Processing Dependency: perl(Pod::Text) >= 3.15 for package: perl-Pod-Usage-1.63-3.el7.noarch--> Processing Dependency: perl-Pod-Perldoc for package: perl-Pod-Usage-1.63-3.el7.noarch---> Package perl-Scalar-List-Utils.x86_64 0:1.27-248.el7 will be installed---> Package perl-Socket.x86_64 0:2.010-4.el7 will be installed---> Package perl-Storable.x86_64 0:2.45-3.el7 will be installed---> Package perl-Text-ParseWords.noarch 0:3.29-4.el7 will be installed---> Package perl-Time-HiRes.x86_64 4:1.9725-3.el7 will be installed---> Package perl-Time-Local.noarch 0:1.2300-2.el7 will be installed---> Package pe

    02
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