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How to ignore xargs commands if stdin input is empty?
...or both GNU and BSD/OSX support I end up using something like: ls /mydir/*.txt | xargs -n 1 -I {} chown root {}, as this answer suggests.
– Luís Bianchin
Jul 17 '18 at 11:12
3
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CentOS+Nginx+PHP+MySQL详细配置(图解) - PHP - 清泛IT论坛，有思想、有深度
...须的，切记！
首先我们把PHP和PHP-FPM下载到同一目录下，此次用的为php-5.3.0.tar.bz2和php-5.3.0-fpm-0.5.12.diff.gz，下载到了同一目录下
#tar xvf php-5.3.0.tar.bz2
#gzip -cd php-5.3.0-fpm-0.5.12.diff.gz | patch -d php-5.3.0 -p1 ...
Useless use of cat?
...ookie tried to pin the UUOC on me for one of my answers. It was a cat file.txt | grep foo | cut ... | cut .... I gave him a piece of my mind, and only after doing so visited the link he gave me referring to the origins of the award and the practice of doing so. Further searching led me to this quest...
Get last n lines of a file, similar to tail
...the very file end with seek(0, 2)).:
eg: f = open('C:/.../../apache_logs.txt', 'rb')
def tail(f, lines=20):
total_lines_wanted = lines
BLOCK_SIZE = 1024
f.seek(0, 2)
block_end_byte = f.tell()
lines_to_go = total_lines_wanted
block_number = -1
blocks = []
while li...
Python script to copy text to clipboard [duplicate]
...
To use native Python directories, use:
import subprocess
def copy2clip(txt):
cmd='echo '+txt.strip()+'|clip'
return subprocess.check_call(cmd, shell=True)
on Mac, instead:
import subprocess
def copy2clip(txt):
cmd='echo '+txt.strip()+'|pbcopy'
return subprocess.check_call(cmd...
Printing the last column of a line in a file
...
One way using awk:
tail -f file.txt | awk '/A1/ { print $NF }'
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刘强东“一元年薪”背后的O2O棋局 - 资讯 - 清泛网 - 专注C/C++及内核技术
...金入股的方式配合上下游转型，目的是为了能够形成一个完整的消费链条。”他对新金融记者表示。
除此之外，京东还看中其在生鲜市场的份额。
刘强东曾表示，在生鲜的部分，永辉超市的量和连锁超市的量不相上下(生鲜上...
Can I mask an input text in a bat file?
...[System.Runtime.InteropServices.Marshal]::PtrToStringAuto($BSTR) > .tmp.txt & set /p password=<.tmp.txt & del .tmp.txt
echo %password%
I'll break this down - you can split it up over a few lines using caret ^, which is much nicer...
@echo off
powershell -Command $pword = read-host "...
云数据及Firebase组件简介 · App Inventor 2 中文网
...存储在 Firebase 中。 当添加新消息时，所有用户都将看到完整的历史记录列表。
相反，其他应用程序无法访问这些变量。 使用 FirebaseDB 组件的不同应用程序将拥有自己单独的云变量存储，并且不会干扰，即使它使用相同的标签...
Getting the folder name from a path
...would probably use something like:
string path = "C:/folder1/folder2/file.txt";
string lastFolderName = Path.GetFileName( Path.GetDirectoryName( path ) );
The inner call to GetDirectoryName will return the full path, while the outer call to GetFileName() will return the last path component - whic...