大约有 1,824 项符合查询结果（耗时：0.0265秒） [XML]
Assign output of os.system to a variable and prevent it from being displayed on the screen [duplicat
...ich I asked a long time ago, what you may want to use is popen:
os.popen('cat /etc/services').read()
From the docs for Python 3.6,
This is implemented using subprocess.Popen; see that class’s
documentation for more powerful ways to manage and communicate with
subprocesses.
Here's t...
Regular expression to match a word or its prefix
...ed the match or not. If you don't, better use the non-capture group to allocate more memory for calculation instead of storing something you will never need to use.
share
|
improve this answer
...
How to ignore whitespace in a regular expression subject string?
...hes using a regular expression pattern? For example, if my search is for "cats", I would want "c ats" or "ca ts" to match. I can't strip out the whitespace beforehand because I need to find the begin and end index of the match (including any whitespace) in order to highlight that match and any w...
How to find out line-endings in a text file?
...
You can use the file utility to give you an indication of the type of line endings.
Unix:
$ file testfile1.txt
testfile.txt: ASCII text
"DOS":
$ file testfile2.txt
testfile2.txt: ASCII text, with CRLF line terminators
To convert from "DOS" to Unix:
$ dos2unix testf...
Sort a text file by line length including spaces
...
Answer
cat testfile | awk '{ print length, $0 }' | sort -n -s | cut -d" " -f2-
Or, to do your original (perhaps unintentional) sub-sorting of any equal-length lines:
cat testfile | awk '{ print length, $0 }' | sort -n | cut -d" "...
Checkout one file from Subversion
... a working branch of the file). Check out that directory and do your modifications.
I'm not sure whether you can then merge your modified copy back entirely in the repository without a working copy of the target - I've never needed to. If so then do that.
If not then unfortunately you may have to ...
In the shell, what does “ 2>&1 ” mean?
... actually be interpreted as "redirect stderr to a file named 1". & indicates that what follows is a file descriptor and not a filename. So the construct becomes: 2>&1.
share
|
improve thi...
Concatenating Files And Insert New Line In Between Files
I have multiple files which I want to concat with cat .
Let's say
7 Answers
7
...
How do I access my SSH public key?
...
cat ~/.ssh/id_rsa.pub or cat ~/.ssh/id_dsa.pub
You can list all the public keys you have by doing:
$ ls ~/.ssh/*.pub
share
|
...
How to write multiple line string using Bash with variables?
...o) is wrong.
Correct would be:
#!/bin/bash
kernel="2.6.39"
distro="xyz"
cat >/etc/myconfig.conf <<EOL
line 1, ${kernel}
line 2,
line 3, ${distro}
line 4 line
...
EOL
cat /etc/myconfig.conf
This construction is referred to as a Here Document and can be found in the Bash man pages und...