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How do I change read/write mode for a file using Emacs?
...ent buffer writable.
Make the buffer writable as well."
(interactive)
(unix-output "chmod" "+w" (buffer-file-name))
(toggle-read-only nil)
(message (trim-right '(?\n) (unix-output "ls" "-l" (buffer-file-name)))))
The function depends on unix-output and trim-right:
(defun unix-output (comm...
How to get file creation & modification date/times in Python?
...platform way is easy - just call os.path.getmtime(path) and you'll get the Unix timestamp of when the file at path was last modified.
Getting file creation dates, on the other hand, is fiddly and platform-dependent, differing even between the three big OSes:
On Windows, a file's ctime (documented...
Difference between two dates in MySQL
...
select
unix_timestamp('2007-12-30 00:00:00') -
unix_timestamp('2007-11-30 00:00:00');
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How do I daemonize an arbitrary script in unix?
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You can daemonize any executable in Unix by using nohup and the & operator:
nohup yourScript.sh script args&
The nohup command allows you to shut down your shell session without it killing your script, while the & places your script in the backgr...
get UTC time in PHP
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@sanmai: a Unix timestamp is by definition always UTC. en.wikipedia.org/wiki/Unix_time
– nikc.org
Jul 20 '15 at 8:20
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Why do people write the #!/usr/bin/env python shebang on the first line of a Python script?
...rdcode something like #!/usr/bin/python; that's ok, but less flexible.
In Unix, an executable file that's meant to be interpreted can indicate what interpreter to use by having a #! at the start of the first line, followed by the interpreter (and any flags it may need).
If you're talking about oth...
Fastest way to tell if two files have the same contents in Unix/Linux?
I have a shell script in which I need to check whether two files contain the same data or not. I do this a for a lot of files, and in my script the diff command seems to be the performance bottleneck.
...
PHP script - detect whether running under linux or Windows?
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You can check if the directory separator is / (for unix/linux/mac) or \ on windows. The constant name is DIRECTORY_SEPARATOR.
if (DIRECTORY_SEPARATOR === '/') {
// unix, linux, mac
}
if (DIRECTORY_SEPARATOR === '\\') {
// windows
}
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Using awk to remove the Byte-order mark
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In addition to converting CRLF line endings to LF, dos2unix also removes BOMs:
dos2unix *.txt
dos2unix also converts UTF-16 files with a BOM (but not UTF-16 files without a BOM) to UTF-8 without a BOM:
$ printf '\ufeffä\n'|iconv -f utf-8 -t utf-16be>bom-utf16be
$ printf '...
What is the reason for performing a double fork when creating a daemon?
.... So if neither of these cases apply, then one fork should be sufficient. "Unix Network Programming - Stevens" has a good section on this.
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follo...