basic unix commands

disk based on the disk location indicated by the handle, without checking whether the file is deleted. DU/etc/| sort-Nr | the more command indicates to display the directory/etc/. when viewing the usage of the directory, the sort parameter-Nr indicates to reverse sort by numerical sorting, because we want to sort the directory size, we cannot use the output of the human-readable size. Otherwise, the directory size contains the words K and M, which may lead to incorrect sorting. 5. In man's case

/doc/hadoop/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/api/src-html/org/apache/hadoop/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/api/org/apache/hadoop/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/api/org/apache/hadoop/lib/service/hadoop/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/hadoop-hdfs-httpfs/apidocs/src-html/org/apache/hadoop/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/hadoop-hdfs-httpfs/apidocs/src-html/org/apache/hadoop/lib/service/ Hadoop/home/myhaspl/hadoop-2.4.1/share/doc/hadoop/hadoop-h

The basic steps for installing SU (Seismic Unix) on Ubuntu16.04 are ubuntu16.04seismic. Seismic Unix (SU) is a source Seismic data processing software developed by the Wave Field Research Center (CWP) of the Colorado mining Institute, at present, many scholars use SU for seismic data processing and programming in Linux. I personally studied FWI and used SU progr

Basic Unix shell script Test1. Which of the following code lines will print your previous working directory to the screen? CA. Echo ~B. Echo $ pwdC. Echo ~ -D. Echo *2. Which of the following symbols can be used to redirect the command output to a file? If the file exists, the file will be overwritten? CA.>B. C.>D. n>3. Which of the following statements enables shell to run the pkgsetup script at pm on Apri

After reading the third chapter of advanced programming in the Unix environment, I also typed the code myself. I also explained some IO functions, including read/write/fseek/fcntl; here is mainly a C function, which is easier to understand. The fcntl function is well explained. It can obtain and change the attributes of the opened file (read-only, write-only, etc. Note the difference between the function and STAT ), the following describes some

Pre-language: I am halfway decent do programmers, in fact, to deal with the usual work of business can also, but the basic knowledge is weak, of course, also with the Chinese computer education has a relationship, usually chat with colleagues, in fact, even if it is trained, for the computer itself know very little, so when the graduation two anniversary, To determine the future of the technical learning direction, but also decided to add the

Basic Commands-2Compression and archivingPackaged:Archive, similar to packing before travellingCompression:To reduce the amount of disk space used, backups can be made to save network bandwidth when transferred over the network.Packaged compression softwareWindows:winrar 360 compression Good 7zip WinZipLinux: Compact format: GZ, Bz2,xz,zip,zCompression algorithms are different, resulting in different compre

myhaspl 18 September 16:21. PKIDrwxrwxr-x. Root root 4096 September 16:25 pypy-2.3.1-srcbash-4.2$This blog all content is original, if reproduced please indicate sourcehttp://blog.csdn.net/myhaspl/Multiple commands can be written on the same line, used once, separated by semicolonsbash-4.2$ Ls-la; CD Numpy;lsTotal dosage 150484DRWX------. 6 MYHASPL myhaspl 4096 September 10 16:55.Drwxr-xr-x. 3 root root 20 September 10 08:23..-RW-------. 1 MYHASPL MY

Part 1ArticleI said that in order to change users' criticism on their console interface, Windows Vista started and planned to change this situation. The appearance of powershell. 1. compatible with shell commands To be compatible with Unix/Linux shell(the master is the command line of bash‑compatible with cmd.exe and bash commands. This is what we mentioned

while the program is running. the following are some functions provided by GDB:It enables you to monitor the value of variables in your program. -- monitor memory and registers.It enables you to set breakpoints so that the program stops running on the specified code line. -- breakpoint debuggingIt enables you to execute your code in one row. -- single-step debugging 12. GDB basic commands:File to load the executable file to be debugged.Kill to termin

After reading the first chapter of the Bible, I am familiar with the entire programming process of Unix. The use of C language is now available. From the Unix architecture, the original operating system, including the kernel and some other software, is often called the Linux kernel as the operating system, which has become a consensus. Familiar with the introduction of shell, the mainstream is Bash (Bourne