大约有 36,000 项符合查询结果（耗时：0.0152秒） [XML]
How to empty (“truncate”) a file on linux that already exists and is protected in someway?
I have a file called error.log on my server that I need to frequently truncate. I have rw permissions for the file. Opening the file in vi > deleting all content > saving works (obviously). But when I try the below
...
MongoDB与内存 - 大数据 & AI - 清泛网移动版 - 专注C/C++及内核技术
...的Stack大小，可以用如下命令确认（单位：K）：
shell> cat /proc/$(pidof mongod)/limits | grep stack | awk -F 'size' '{print int($NF)/1024}'
如果Stack过大（比如：10240K）的话没有意义，简单对照命令结果中的Size和Rss：
shell> cat /proc/$(pidof mongod)/...
Automatic counter in Ruby for each?
...ample, if you want to map with an index or something like that) you can concatenate enumerators with the each_with_index method, or simply use with_index:
blahs.each_with_index.map { |blah, index| something(blah, index)}
blahs.map.with_index { |blah, index| something(blah, index) }
This is somet...
How to replace ${} placeholders in a text file?
...than Leffler for the tip to pass multiple -e arguments to the same sed invocation.
share
|
improve this answer
|
follow
|
...
How to solve Permission denied (publickey) error when using Git?
... be applied to all other git repositories which support SSH pubkey authentications. (See gitolite, gitlab or github for example.)
First start by setting up your own public/private key pair set. This
can use either DSA or RSA, so basically any key you setup will work.
On most systems you can ...
Converting an integer to a string in PHP
...sing
echo "I'd like {$var} waffles"; // = I'd like 5 waffles
// String concatenation
echo "I'd like ".$var." waffles"; // I'd like 5 waffles
// The two examples above have the same end value...
// ... And so do the two below
// Explicit cast
$items = (string)$var; // $items === "5";
// Functio...
Vim delete blank lines
...e the unique requirement. Someone may still keep one of the empty line. :%!cat -s may be the choice..
– coanor
Nov 21 '12 at 5:04
...
ipython reads wrong python version
...ipython. Let's look inside:
Edit 9/7/16 -- The file now looks like this:
cat /usr/local/bin/ipython
#!/usr/bin/python
# -*- coding: utf-8 -*-
import re
import sys
from IPython import start_ipython
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw|\.exe)?$', '', sys.argv[0])
...
How does git compute file hashes?
...o substitute CRLFs by LFs
# by using `perl -pe 's/\r$//g'` instead of `cat` in the next 2 commands
local size=$(cat $1 | wc -c | sed 's/ .*$//')
( echo -en "$type $size\0"; cat "$1" ) | sha1sum | sed 's/ .*$//'
}
Test:
$ echo 'Hello, World!' > test.txt
$ git hash-object test.txt
8a...
How do I parse command line arguments in Bash?
...)
Usage demo-space-separated.sh -e conf -s /etc -l /usr/lib /etc/hosts
cat >/tmp/demo-space-separated.sh <<'EOF'
#!/bin/bash
POSITIONAL=()
while [[ $# -gt 0 ]]
do
key="$1"
case $key in
-e|--extension)
EXTENSION="$2"
shift # past argument
shift # past value
;;
-...