我在代码中运行这个公式有困难,简单地说,我试图通过for循环来模拟这种情况发生的1000 times.The,希望把TF的时间加起来是真的,TS是真的。我得到了一个错误,我丢失了一个真/假语句,并尝试重新工作的函数,但仍然很卡住了。如有任何帮助或建议,将不胜感激。
#Parameters
c=0.10 #colonization rate
A=10 #Area of all islands(km^2)
d=100 #Distance from host to target (A-T)
s=0.5 #magnitude of distance
d0=100 #Specific &
我不能使用“`curl”从网上获取内容。我试着安装它,得到了下面的输出:
Some packages could not be installed. This may mean that you have
requested an impossible situation or if you are using the unstable
distribution that some required packages have not yet been created
or been moved out of Incoming.
The following information may he
我正试图在我的.zshrc中进行操作系统检查。在Ubuntu上运行时,我无法获得与Ubuntu的字符串比较的正确匹配。
片段:
function get_linux_distro()
{
echo `awk -F= '/^NAME/{print $2}' /etc/os-release`
}
function is_os_ubuntu()
{
set -x
local dist=`get_linux_distro`
if [[ ${dist} = "Ubuntu"* ]]; then # <<< string
我正在运行Ubuntu14.04.5和Apache2.4.7。我希望在LocationMatch指令中获得对命名组和反向引用的支持,该指令是(未发布的) 2.4.8的一部分。看起来我应该能够安装2.4.10,但我还不知道如何安装。我已经在这里找到了类似问题,但是我对版本控制还不太熟悉,并且倾向于想办法让它做我想做的事情。我如何升级Apache以便获得这些特性?这跟优先权有关吗?是否有令人信服的理由不这样做?
ubuntu@server:/$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Descripti
下面是运行sudo apt-get update时收到的错误消息:
W: Failed to fetch http://archive.ubuntu.com/ubuntu/dists/trusty/Release Unable to find expected entry 'restricted/source/Sources' in Release file (Wrong sources.list entry or malformed file)
E: Some index files failed to download. They have been ignored,
我刚刚安装了ubuntu服务器64位到我的raspberry pi (与官方的映像程序),开始使用它,但许多软件包找不到。比如ruby,python3-libotrrent等,我得到的不是E: Unable to locate package libboost-python就是E: Package 'python3-libtorrent' has no installation candidate。您有什么解决方案吗,我以前使用过raspbian,它工作得很好,但是速度更慢。谢谢你的回复!
编辑
我的apt更新输出:
Hit:1 http://ppa.launchpad.net
我试图创建一个ubuntu对接图像,但当我检查进程时,进程没有在后台运行。
以下是命令
PREMs-MacBook-Pro:Documents prem$ docker run ubuntu:16.04 grep -v '^#' /etc/apt/sources.list
deb http://archive.ubuntu.com/ubuntu/ xenial main restricted
deb http://archive.ubuntu.com/ubuntu/ xenial-updates main restricted
deb http://archive.ubun
我一直在尝试更新我的Ubuntu20.04服务器,并得到了以下内容:
mike@:~$ sudo apt update
Err:1 http://za.archive.ubuntu.com/ubuntu focal InRelease
Could not connect to za.archive.ubuntu.com:80 (197.155.77.2). - connect (111: Connection refused) Could not connect to za.archive.ubuntu.com:80 (2c0f:fe40:8001:10::2). - connect (1
我刚刚安装了Ubuntu服务器12.04 LTS。我正在尝试安装构建必需的软件包;但是,当我试图安装它时,我会收到以下错误:
Some packages could not be installed. this may mean that you have an impossible situation or it you are using the unstable distribution that some required packages have not yer been created or been moved out of Incoming.
The following in
当我检查后缀版本时
postconf -d | grep mail_version
我得到的输出是
mail_version = 2.11.0 milter_macro_v = $mail_name $mail_version
但是当我运行apt-get install postfix时,它会返回“后缀已经是最新版本”。
我的sources.list内容:
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.
deb http