我已经编写了shell脚本,它从输入文件中读取命令并执行命令。我有这样的命令:
cat linux_unit_test_commands | grep "dmesg"
在输入文件中。在执行shell脚本时,我收到下面的错误消息:
cat: |: No such file or directory
cat: grep: No such file or directory
cat: "dmesg": No such file or directory
剧本:
#!/bin/bash
while read line
do
output=`$line
我最近在Compaq C504EA上安装了Ubuntu14.04LTS(删除旧的Windows安装),我正在尝试启用蓝牙。
我已经看过所有的rfkill列表,结果是:
0: hp-wifi: Wireless LAN
Soft blocked: no
Hard blocked: no
1: hp-bluetooth: Bluetooth
Soft blocked: no
Hard blocked: no
2: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
当你打开蓝牙系统设置时,它写的是Bluetooth is disabled,不管
尝试在dmesg中打印消息时在小片段中接收错误
#include<linux/kernel.h>
printk(KERN_INFO "\n hello there I am in dmesg \n");
**错误:avotstbr99 99:root:/tmp# gcc dmessage.c
dmessage.c:4:在字符串常量**之前的错误:预期‘)’
昨天(05/21)我升级了我的Ubuntu12.04内核:
uname -a:
Linux vi 3.2.0-24-generic #37-Ubuntu SMP Wed Apr 25 08:43:22 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux
在重新启动之后,我安装的外部Samba共享停止工作。
当我执行:
sudo mount -t cifs //192.168.101.168/video /mnt/video
结果是:
mount error: cifs filesystem not supported by the system
mount erro
因为我还在学习内核模块编程,所以无法找出问题背后的合理性。当我运行insmod hello.ko时,dmesg or /var/logs/message不显示/打印消息,而在运行rmmod hello.ko时,dmesg or /var/logs/message从hello_init(void) and hello_exit(void)显示/打印字符串。
#include <linux/init.h>
#include <linux/module.h>
MODULE_LICENSE("Dual BSD/GPL");
static int hello_
我需要将大数据写入磁盘,所以我使用FileStream.openAsync()
this.file_stream = new FileStream();
this.file_stream.openAsync(fl, FileMode.WRITE);
//Write large get from database
while(i < 10240000) {
this.file_stream.write(bigDatas)
i = i + 1;
}
然后,由Linux (来自‘dmesg’的消息副本)杀死的应用程序:
杀死进程4267 (MyFlex)总计-vm:12827