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How can I extract a predetermined range of lines from a text file on Unix?
I have a ~23000 line SQL dump containing several databases worth of data. I need to extract a certain section of this file (i.e. the data for a single database) and place it in a new file. I know both the start and end line numbers of the data that I want.
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How can I use inverse or negative wildcards when pattern matching in a unix/linux shell?
Say I want to copy the contents of a directory excluding files and folders whose names contain the word 'Music'.
11 Answers...
How to remove files and directories quickly via terminal (bash shell) [closed]
...f is rm -rf.
Also note that what you're learning applies to bash on every Unix OS: OS X, Linux, FreeBSD, etc. In fact, rm's syntax is the same in pretty much every shell on every Unix OS. OS X, under the hood, is really a BSD Unix system.
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Ubuntu says “bash: ./program Permission denied” [closed]
...e system. Then chmod u+x program_name on the local copy and execute that.
Unix and Unix-like systems generally will not execute a program unless it is marked with permission to execute. The way you copied the file from one system to another (or mounted an external volume) may have turned off execut...
Peak memory usage of a linux/unix process
Is there a tool that will run a command-line and report the peak RAM usage total?
20 Answers
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Useless use of cat?
...on I mentioned. That reason has to do with the orthogonal design spirit of Unix. grep does not cut and ls does not grep. Therefore at the very least grep foo file1 file2 file3 goes against the design spirit. The orthogonal way of doing it is cat file1 file2 file3 | grep foo. Now, grep foo file1 is m...
深入浅出计算机字符集编码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...够通过，而前台输入则不能。
此时若后台采用的是JAVA编程，问题便很容易解决直接用destStr = new String(sourceStr.getByte(“UTF-8”), “EUC-JP”)就可以进行编码的转换，不过C++就没那么幸运了，除非按照一定的逻辑自行实现一套编码...
How can I see the assembly code for a C++ program?
...gram yourself, you can ask your compiler to emit assembly source. For most UNIX compilers use the -S switch.
If you are using the GNU assembler, compiling with -g -Wa,-alh will give intermixed source and assembly on stdout (-Wa asks compiler driver to pass options to assembler, -al turns on assemb...
Is there a way for multiple processes to share a listening socket?
...s without using fork() and doesn't have a parent/child relationship, using Unix Sockets.
– Rahly
Aug 9 '14 at 21:28
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Find CRLF in Notepad++
...on't work.
You can manually copy the EOL and paste it into the field for Unix files (LF-only).
Simple search (Ctrl+F), Search Mode = Extended
The "Extended" option shows \n and \r as characters that could be matched.
As with the Normal search mode, Notepad++ is looking for the exact...