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Unix shell script to truncate a large file
I am trying to write a Unix script which will truncate/empty a file which is continuously being written/open by an application when it reaches say 3GB of space. I know that the below command would do it :
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Excel RTD(Excel Real-Time Data)实时刷新数据技术 - C/C++ - 清泛网 - 专注C/C++及内核技术
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第一个变量 ProgID 表示Real-Time Data 服务器（RTD Server）的编程标识符 (ProgID)。Server 变量指示运行RTD Server的计算机的名称；如果RTD Server在本地运行，则可以将此变量设置为空字符串或将其忽略。其他变量只表示发送到RTD Server的...
Windows equivalent to UNIX pwd
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cd without any parameters is equivalent to pwd on Unix/Linux.
From the console output of typing cd /?:
Displays the name of or changes the current directory.
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Type CD without parameters to display the current drive and directory.
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Convert unix time to readable date in pandas dataframe
I have a dataframe with unix times and prices in it. I want to convert the index column so that it shows in human readable dates.
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Convert decimal to hexadecimal in UNIX shell script
In a UNIX shell script, what can I use to convert decimal numbers into hexadecimal? I thought od would do the trick, but it's not realizing I'm feeding it ASCII representations of numbers.
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unix diff side-to-side results?
How can I plot the results of a unix diff command side-to-side instead of one difference after the other? See below for an example:
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How do I set the time zone of MySQL?
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It will return 02:00:00 if your timezone is +2:00.
To get the current UNIX timestamp:
SELECT UNIX_TIMESTAMP();
SELECT UNIX_TIMESTAMP(NOW());
To get the timestamp column as a UNIX timestamp
SELECT UNIX_TIMESTAMP(`timestamp`) FROM `table_name`
To get a UTC datetime column as a UNIX timestam...
Convert line-endings for whole directory tree (Git)
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dos2unix does that for you. Fairly straight forward process.
dos2unix filename
Thanks to toolbear, here is a one-liner that recursively replaces line endings and properly handles whitespace, quotes, and shell meta chars.
find ...
Unix command to find lines common in two files
I'm sure I once found a unix command which could print the common lines from two or more files, does anyone know its name? It was much simpler than diff .
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How to check if a Unix .tar.gz file is a valid file without uncompressing?
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http://linux.about.com/od/commands/l/blcmdl1_gzip.htm
from: http://unix.ittoolbox.com/groups/technical-functional/shellscript-l/how-to-test-file-integrity-of-targz-1138880
To test the gzip file is not corrupt:
gunzip -t file.tar.gz
To test the tar file inside is not corrupt:
gunzip -c f...