小编cat*_*h23的帖子

我有远程盒子VNC和jwm桌面访问。
没有菜单，没有桌面图标，只有一个终端窗口。

我已经下载了 Chrome 的.deb包并安装了它。

如何从终端窗口运行它？

我的/etc/apt/sources.list包含：

nazar_art@nazar-desctop:/etc/apt$ cat source.list
deb http://security.ubuntu.com/ubuntu precise-security main universe
nazar_art@nazar-desctop:/etc/apt$ cat sources.list.old
deb http://archive.ubuntu.com/ubuntu precise universe
nazar_art@nazar-desctop:/etc/apt$ cat source.list
deb http://security.ubuntu.com/ubuntu precise-security main universe
nazar_art@nazar-desctop:/etc/apt$ 

我根据这篇文章更新了如何恢复默认存储库？

但是当我运行时它调用了另一个问题sudo apt-get update我有一些这样的输出：

Err http://ua.archive.ubuntu.com main/restricted Sources                       
  404  Not Found [IP: 91.189.91.13 80]
Err http://ua.archive.ubuntu.com main/universe Sources                         
  404  Not Found [IP: 91.189.91.13 80]
Err http://ua.archive.ubuntu.com main/multiverse Sources                       
  404  Not Found [IP: 91.189.91.13 80]
Err http://ua.archive.ubuntu.com main/restricted amd64 Packages                
  404  Not Found [IP: 91.189.91.13 80]
Err http://ua.archive.ubuntu.com main/universe amd64 Packages …

我不明白为什么，当我在 Ubuntu 12.04 中尝试插入外部 USB 驱动程序时，我看到下一条消息：

Error mounting: mount exited with exit code 1: helper failed with:
mount: only root can mount /dev/sdb1 on /media/sdb1

以下是内容/etc/fstab：

# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point> …

我根据这个教程安装了ExQuilla After Installation: Creating an Exchange account。用于访问Microsoft Exchange 帐户。

我毫无困难地访问了我的 MS 邮件：

但这种软不是免费的。许可证将超过 2 周。

出于相同目的，哪些免费替代方案是可能的？

我想将任何文件复制到我的外部硬盘驱动器。但总是当我尝试这样做时，我有下一个输出：

cp: cannot create regular file /media/NameOfCard/[file]' : Read only file system

我也试过：

sudo chmod -R 775 /media/NameOfCard
sudo chmod -R 777 /media/NameOfCard

但同样的效果—— ... Read only file system

更新：

在mount我有下一个输出之后：

nazar_art@nazar-desctop:~$ mount
/dev/sda1 on / type ext4 (rw,errors=remount-ro)
proc on /proc type proc (rw,noexec,nosuid,nodev)
sysfs on /sys type sysfs (rw,noexec,nosuid,nodev)
none on /sys/fs/fuse/connections type fusectl (rw)
none on /sys/kernel/debug type debugfs (rw)
none on /sys/kernel/security type securityfs (rw)
udev on /dev type devtmpfs (rw,mode=0755)
devpts on /dev/pts …

我尝试sqldeveloper通过以下方式安装：

Download SQL Developer from Oracle website (I chose Other Platforms download).\n\nExtract file to /opt:\n\nsudo unzip sqldeveloper-*-no-jre.zip -d /opt/\nsudo chmod +x /opt/sqldeveloper/sqldeveloper.sh\nLinking over an in-path launcher for Oracle SQL Developer:\n\nsudo ln -s /opt/sqldeveloper/sqldeveloper.sh /usr/local/bin/sqldeveloper\nEdit /usr/local/bin/sqldeveloper.sh replace it\'s content to:\n\n#!/bin/bash\ncd /opt/sqldeveloper/sqldeveloper/bin\n./sqldeveloper "$@"\nRun SQL Developer:\n\nsqldeveloper\n

但它显示了下一个输出：

nazar@lelyak-desktop:/opt/sqldeveloper\xe2\x9f\xab ./sqldeveloper.sh \n\n Oracle SQL Developer\n Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved.    \n\n LOAD TIME : 401#\n# A fatal error has been detected by the Java …

我正在尝试使用以下命令在 Ubuntu Server 12.04 上安装 tomcat 7：

sudo apt-get install tomcat7

我尝试根据此安装教程执行此操作，但立即收到此答案：

Reading package lists... Done
Building dependency tree       
Reading state information... Done
Package tomcat7 is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'tomcat7' has no installation candidate

更新：

我尝试tomcat7按照本教程逐步下载和安装。但是当我尝试运行程序时

`$ ./catalina.sh run` 

我收到了一些警告 + SEVERE: Cannot start server. Server instance is …