add-apt-repository:command not found

系统环境:ubuntu 14.04 - minimal,bandwagonhost VPS
直接执行命令:

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add-apt-repository ppa:webupd8team/java

显示错误:add-apt-repository:command not found,网上解决办法是直接安装python-software-properties

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apt-get install python-software-properties

安装后还是报command not found,网上查找资料发现安装python-software-properties外还需要software-properties-common

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apt-get install software-properties-common

终于成功了

Ubuntu 环境下SublimeText3中文输入问题解决方案

拷贝如下代码到文件sublime-imfix.c文件中,该文件需要自己创建,放到当前用户主目录。

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/*
* sublime-imfix.c
* Use LD_PRELOAD to interpose some function to fix sublime input method support for linux.
* By Cjacker Huang <jianzhong.huang at i-soft.com.cn> *
*
* gcc -shared -o libsublime-imfix.so sublime_imfix.c `pkg-config --libs --cflags gtk+-2.0` -fPIC
* LD_PRELOAD=./libsublime-imfix.so sublime_text
*/
#include <gtk/gtk.h>
#include <gdk/gdkx.h>
typedef GdkSegment GdkRegionBox;
struct _GdkRegion
{
long size;
long numRects;
GdkRegionBox *rects;
GdkRegionBox extents;
};
GtkIMContext *local_context;
void
gdk_region_get_clipbox (const GdkRegion *region,
GdkRectangle *rectangle)
{
g_return_if_fail (region != NULL);
g_return_if_fail (rectangle != NULL);
rectangle->x = region->extents.x1;
rectangle->y = region->extents.y1;
rectangle->width = region->extents.x2 - region->extents.x1;
rectangle->height = region->extents.y2 - region->extents.y1;
GdkRectangle rect;
rect.x = rectangle->x;
rect.y = rectangle->y;
rect.width = 0;
rect.height = rectangle->height;
//The caret width is 2;
//Maybe sometimes we will make a mistake, but for most of the time, it should be the caret.
if (rectangle->width == 2 && GTK_IS_IM_CONTEXT(local_context)) {
gtk_im_context_set_cursor_location(local_context, rectangle);
}
}
//this is needed, for example, if you input something in file dialog and return back the edit area
//context will lost, so here we set it again.
static GdkFilterReturn event_filter (GdkXEvent *xevent, GdkEvent *event, gpointer im_context)
{
XEvent *xev = (XEvent *)xevent;
if (xev->type == KeyRelease && GTK_IS_IM_CONTEXT(im_context)) {
GdkWindow *win = g_object_get_data(G_OBJECT(im_context), "window");
if (GDK_IS_WINDOW(win)) {
gtk_im_context_set_client_window(im_context, win);
}
}
return GDK_FILTER_CONTINUE;
}
void gtk_im_context_set_client_window (GtkIMContext *context,
GdkWindow *window)
{
GtkIMContextClass *klass;
g_return_if_fail (GTK_IS_IM_CONTEXT (context));
klass = GTK_IM_CONTEXT_GET_CLASS (context);
if (klass->set_client_window) {
klass->set_client_window (context, window);
}
if (!GDK_IS_WINDOW (window)) {
return;
}
g_object_set_data(G_OBJECT(context), "window", window);
int width = gdk_window_get_width(window);
int height = gdk_window_get_height(window);
if (width != 0 && height != 0) {
gtk_im_context_focus_in(context);
local_context = context;
}
gdk_window_add_filter (window, event_filter, context);

相关依赖软件的安装

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sudo apt-get install build-essential libgtk2.0-dev

按照文件头上注释所说的编译该文件,在终端里进入主目录中,输入如下命令:

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cd
gcc -shared -o libsublime-imfix.so sublime-imfix.c `pkg-config --libs --cflags gtk+-2.0` -fPIC

最后在主目录下得到libsublime-imfix.so这个共享库。将libsublime-imfix.so复制到Sublime Text 3程序所在目录(采用绿色压缩包解包安装),建立sublime.sh文件。
内容如下:

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LD_PRELOAD=<path to sublime_text_3>/libsublime-imfix.so <path to sublime_text_3>/sublime_text

使用主菜单编辑器添加指向sublime.sh的主菜单

Ubuntu设置ssh密钥登录

生成keyfile:

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ssh-keygen -b 1024 -t dsa -N <yourKeypasswd> -f ~/.ssh/michael_dsa

其中为你使用keyfile时的密码。

将生成私钥、公钥两个文件:
michael_dsa
michael_dsa.pub

上传keyfile:

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ssh-copy-id -i ~/.ssh/michael_dsa.pub michael@192.168.1.111

该命令自动将公钥复到用户的~/.ssh/authorized_keys文件中,完成后即可以密钥方式登录。

方法一:使用ssh-add

ssh-add ~/.ssh/michael_dsa

方法二:config中指定keyfile

nano ~/.ssh/config
Host myhost
HostName 192.168.1.111
User username
identityfile ~/.ssh/michael_dsa

设定config后,ssh登录、scp命令可简化为:
ssh myhost
scp test.txt myhost:

使用gzip备份还原mysql数据库

本文说明如何使用gzip备份还原数据库可以
导出数据(备份):

mysqldump -u user -p database | gzip > database.sql.gz
导入数据(还原):
gunzip < database.sql.gz | mysql -u user -p database