1, Command introduction:DF is used to detect disk space usage.2. Command format:DF [Options] File3. Command parameters:Necessary parameters:-A All File system list-h easy to read mode display-H equals "-H", but the formula, 1k=1000, rather than 1k=1024-I display inode information-K block is 1024 bytes-L show local file system only-M block is 1048576 bytes--no-sync Ignore sync command-P output format POSIX--sync perform the sync command before obtaining the disk information-T File system typeSele
LinuxDFCommand DF(disk free)Feature Description: Displays information about the disk. Syntax:DF[-ahhiklmpt][--block-size=Additional notes:DFthe file system and usage scenarios for the disk can be displayed. Parameters:-A or--all contains all file systems. --block-size=-H or--human-readable displays information in a more readable way. -H or--si is the same as the-h parameter, but is calculated as Bytes instead of the Bytes. -I or--inodes displays
DfFunctionDisplays the maximum available space and usage for all current file systemsParameters-A: Displays all file systems and disk usage for each partition-I: Show i-nodes usage-K: size is represented by K (default value)-T: Displays all partition disk usage for one file system-X: Displays all partition disk usage that are not a single file system-T: Displays the name of the file system to which each partition belongsDuFunctionQuery disk usage space for a file or directoryParameters-A: Displa
breakpoint continues to upload a file to prevent network interruption when downloading large filesWget-b URL: Download a file in the background, tail-f wget-log View Download Progresswget--user-agent= "XXX" URL: Use pseudo proxy name to downloadwget--tries=40 URL: Download a file, failed to retry 40 timeswget--reject=gif URL: Download a file, but do not download GIF files for filtering the specified formatWget-o Download.log URL: Writes the download log to Download.logwget--ftp-user=username--f
breakpoint continues to upload a file to prevent network interruption when downloading large filesWget-b URL: Download a file in the background, tail-f wget-log View Download Progresswget--user-agent= "XXX" URL: Use pseudo proxy name to downloadwget--tries=40 URL: Download a file, failed to retry 40 timeswget--reject=gif URL: Download a file, but do not download GIF files for filtering the specified formatWget-o Download.log URL: Writes the download log to Download.logwget--ftp-user=username--f
1 DF Command
Used to view the size of each partition of the disk, used, available, mount point, and so on, remember oh is to view the partitions OH
2 du command
Lists the total size of a directory, which includes the size of the directory itself, as well as all of the files in the directory, as shown in the following list
3 ln to establish soft links with hard links
When you establish a hard link, you do this by adding an Inode: Document name to t
Description: filezilla is a free and open-source FTP client software. It can be divided into client and server versions and has all FTP software functions. the controllable and organized interface and simplified method for managing multiple sites
None is a mount point without a specific partition. In fact, some special Russian files are mounted. The details are as follows: udev->/Dev is the system's device file. The hardware device found at startup is stored as a file here. Each device file
When configuring the ISIS-TE met a pile of mpls dste command, or understand the good DSTE, read a afternoon no clue, this article writes the relationship of DSCP-PHB is quite clear, let's take a look ~~
DSCP (Differentiated Services CodePoint)
Reprint please indicate the source: Http://my.csdn.NET/ye_shen_wei_mian
Recently in an open source code to contact the probability density function, the probability density function is normal (Gaussian) distribution, is based on boost library
Profile:The database object index is very similar to the book's directory, mainly to improve the speed of retrieving data from the table.Because the data is stored in a database table, the index is created on a database table object, consisting of a
MySQL data types are divided into:Integer type, floating-point type, fixed-point number typeDate and Time typeString typeBinary typeInteger type byte number unsigned number value range signed number rangeTINYINT 1 0-255-128-127SMALLINT 2 0-65535-3276
DF is used to view the currently mounted file system-A View all file systemsYou can specify your own capacity unit,-BM-BG but the option of H is good-I view Inode usage information-L (L) displays the local file system--output can specify which
([arr, arr], Axis=1) # Connect two arr, in the direction of the row---------------Pandas-----------------------Ser = series () Ser = series ([...], index=[...]) #一维数组, dictionaries can be converted directly to Seriesser.values ser.index Ser.reindex ([...], fill_value=0) #数组的值, index of array, redefine index ser.isnull () pd.isn Ull (Ser) pd.notnull (Ser) #检测缺失数据ser. name= ser.index.name= #ser本身的名字, ser index name Ser.drop (' x ') #丢弃索引x对应的值ser +ser #算术运算ser. Sort_index () Ser.order () # Sort b
DirectoryRead data display data display rows and columns view data format dtpyes display column name add default column name Display data 5 rows after display of data unique values skipped line I of the file does not read the missing value recognition data cleaning processing null value change data format change column name remove duplicate value replace value in list Data preprocessing to data sorting data data extraction by label extraction by position extraction by label and position extracti
, df. name dfname from v $ tablespace ts, v $ datafile df where ts. ts # = df. ts #;
TSNAME DFNAME----------------------------------------------------------------------SYSTEM/u01/app/oracle/oradata/orcl/system01.dbfUNDOTBS1/u01/app/oracle/oradata/orcl/undotbs01.dbfSYSAUX/u01/app/oracle/oradata/orcl/sysaux01.dbfUSERS/u01/app/oracle/oradata/orcl/users01.dbfEXAMPLE/
Importmatplotlib fromPandasImportDataFrameImportNumPy as NPImportPandas as PDImportMySQLdbImportMatplotlib.pyplot as Plt#DF =padaas Dataframe Object (two-dimensional tag array)#S =pandas Series object (one-dimensional tag array)db = MySQLdb.connect (host="localhost", port=3306, user="Root", passwd="1234", db='SPJ', charset="UTF8")#connecting to a databasefilename ='Count_day.csv'#File path namequery ='select * FROM J'#SQL query Statements #导入数据pd. Rea
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