When we use a real machine for Android Application debugging, we cannot obtain the debugging information. The error message is as follows: Unable to open log device '/dev/log/main': no such file or directory.
This is because our mobile phone has not enabled the log record. The following uses Huawei u8860 as an example to enable the log function of the mobile phone:
1. Enter * #2846579 # * in the dialing i
The generic file system name of the Linux system is similar to/DEV/SDA1 or/DEV/HDA1, but today, with the maintenance of the system, the DF-H command is used to knock out the/dev/mapper/volgroup-lv_root and/dev/mapper/ Volume-lv_home two file system name, puzzled, on the Internet to find information, in this talk about/
View the areas that are already well-divided[[EMAILNBSP;PROTECTED]NBSP;~]#NBSP;FDISKNBSP;-LNBSP;/DEV/SDANBSP;DISKNBSP;/DEV/SDA:NBSP;21.5NBSP;GB, 21474836480bytes255heads,63sectors/track,2610cylindersunits= cylindersof16065*512=8225280bytesSectorsize (logical/ Physical):512bytes/512bytesi/osize (minimum/optimal): 512bytes /512bytesDiskidentifier:0x7d57cb1fDeviceBoot StartEnd BlocksIdSystem/
/Dev/null2 gt; amp; 1 today, a friend suddenly saw the following content in his own Linux maintained:/var/spool/cron/root: www.2cto. com3019 ***/usr/bin/** dcon. sh gt;/dev/null2 gt; amp; 15923 ** 1-7/home /...
/Dev/null 2> 1 details today a friend suddenly saw the following content in his own Linux maintained:/var/spool/cron/root: www.2cto.com 30 19 ****/u
Shell gt;/dev/null2 gt; amp; 1 details shell may often see: gt;/dev/null2 gt; amp; the result of the 1 command can be defined in the form of % gt;, where % gt; indicates the file descriptor. We combine this command: gt;/dev/null2 gt; amp; 1 split into four parts for analysis: 1: first... shell ">/dev/null 2>
Transferred from: http://blog.csdn.net/rockrockwu/article/details/7357648System boot process platform device, the driver registration is complete, why in the/dev directory is automatically created a good device node?The Automatically created device node in the/dev directory can be passed class_create () and then Device_create (). But in trackingKernel platform registration process can be found, in fact, the
The "Digest"/dev/mem is a full image of physical memory that can be used to access physical memory, and the general usage is open ("/dev/mem", o_rdwr| O_sync), then mmap, then you can use the Mmap address to access the physical memory, which is actually a way to implement the user space driver.
http://blog.csdn.net/wlp600/article/details/6893636#
1, user space-driven advantagesThere are severa
This article consists of two parts: 1. Process 2 of generating libmysql. A for DEV-C ++. Devc ++ in Windows
C Language Access MySQL database environment configuration 1. The process of generating libmysql. A for DEV-C ++ aims: Because DEV-C ++ uses GCC, MySQL's libmysql. dll only supports visual stdio. Therefore, libmysql. A needs to be generated from libmysql.
When Linux runs the partprobe command, it encounters Unable to open/dev/sr0 read-write (Read-only file system), partprobesr0
When using fdisk to create a partition, we will use the partprobe command to allow the kernel to re-read the partition information to avoid restarting the system. However, the following error message "Warning: unable to open/dev/sr0 read-write (Read-only file system ). /
During the FOTA differential upgrade, there was a retouch_binaries operation. I got stuck when I got here, and the waiting circle could not be completed in a few days. Later, I found that it was all done. Find a patch to solve the problem and change/dev/random to/dev/urandom.
diff --git a/updater/install.c b/updater/install.cindex a1acdb9..2f2631a 100644--- a/updater/install.c+++ b/updater/install.c@@ -450,
WatchFirst introduce the Watch option, refer to here. The ability to update the Bundle.js file automatically after the related source file is changed.The watch function can be turned on by adding watch:true or performing webpack-w in the configuration file;The test found that all the JS, CSS and other modules related to (one or more) bundle.js changed, and the bundle.js files on the hard disk were automatically packaged and updated.Webpack-dev-serverW
1. Generate Package.json in the project: Enter NPM init in the project root directory and enter the appropriate information as prompted. (You can also not generate a Package.json file, but Package.json is useful, all suggestions are generated)2. Installing WebpaackA. Installing WEBPACK:NPM install WEBPACK-G in the globalB. Install webpack into the project and write Webpack to Package.json devdependencies: Go to the project root and enter NPM install Webpack--save-
1. Interpretation 1
>/ DEV/null 2> 1: redirect all standard output and error output to/dev/null, that is, discard all generated information.
command> file 2> file and command> file 2> 1 are different.
first, command> file 2> file means to send the standard output information and error output information generated by the command to file. Command> file 2> file: Both stdout and stderr are di
In Linux, ">/dev/null 2> 1" is often encountered in both crontab and Common commands ".
For example, in a crontab job, if you do not want to send an email, you can use either of the following methods:
First, set mailto = "" to null.
[[emailprotected] etc]# cat crontabSHELL=/bin/bashPATH=/sbin:/bin:/usr/sbin:/usr/binMAILTO=""HOME=/# run-parts01 * * * * root run-parts /etc/cron.hourly02 4 * * * root run-parts /etc/cron.daily22 4 * * 0 root run-parts
Introduced/ dev/shm/ is a device that uses the Tmpfs file system, which is actually a special file system. the default size in Redhat is half of physical memory, so that time is not mkfs formatted. TMPFS is a memory-based virtual file system on the Linux/unix system .TMPFS can use your memory or swap partition to store the file ( that is, its storage space in virtual memory , the VM consists of real memory and swap ). Thus, TMPFS primarily stores s
Introduced / dev/shm/ tmpfs file system is actually a special file system. redhat use without mkfs formatted. Tmpfs is a memory-based Linux/unix system. Virtualfile System. TMPFS can use your memory or swap partition to store files (that is, its storage space isVirtual Memoryin, the VMbyReal Memoryand theSwapcomposition). Thus, TMPFS primarily stores staged files. It has the following 2 advantages: 1. The size of the dynamic file
Transferred from: http://loofeer.blog.51cto.com/707932/791065The default system will load/DEV/SHM, which is called TMPFS, some say with RAMDisk (virtual disk), but not the same. Like a virtual disk, TMPFS can use your RAM, but it can also be stored using your swap partition. And the traditional virtual disk is a block device, and requires a command such as MKFS to really use it, TMPFS is a file system, not a block device; you just install it and it's
error message:[Root@compute2 ~]# pvcreate-vvv/dev/sdb1 ... DEVICE/DEV/SDB1 not found (or ignored by filtering). No devices to process. Unlocking/run/lock/lvm/p_orphans _undo_flock/run/lock/lvm/p_orphans Lvmcache has no info for vgname "#orphans". Setting Global/notify_dbus to 1 completed:pvcreate-vvv/dev/sdb1
Solution idea:1. See if there are/
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