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How do I execute any command editing its file (argument) “in place” using bash?
... sponge(1), which lets you do things like this:
% sed "s/root/toor/" /etc/passwd | grep -v joey | sponge /etc/passwd
However, sponge suffers from the same problem Steve Jessop comments on here. If any of the commands in the pipeline before sponge fail, then the original file will be written over...
Mongod complains that there is no /data/db folder
...:
First check what user and group your mongo user has:
# grep mongo /etc/passwd
mongod:x:498:496:mongod:/var/lib/mongo:/bin/false
You should have an entry for mongod in /etc/passwd , as it's a daemon.
sudo chmod 0755 /data/db
sudo chown -R 498:496 /data/db # using the user-id , group-id
Yo...
MySQL “incorrect string value” error when save unicode string in Django
... automatically.
#! /usr/bin/env python
import MySQLdb
host = "localhost"
passwd = "passwd"
user = "youruser"
dbname = "yourdbname"
db = MySQLdb.connect(host=host, user=user, passwd=passwd, db=dbname)
cursor = db.cursor()
cursor.execute("ALTER DATABASE `%s` CHARACTER SET 'utf8' COLLATE 'utf8_unic...
Reading specific lines only
...above:
>>> import linecache
>>> linecache.getline('/etc/passwd', 4)
'sys:x:3:3:sys:/dev:/bin/sh\n'
Change the 4 to your desired line number, and you're on. Note that 4 would bring the fifth line as the count is zero-based.
If the file might be very large, and cause problems whe...
转型产品经理必看 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...领域的产品经理们，奉为经典。张小龙，微信之父，深谙人性，理解潮流，能把一款产品做到人们的生活中，几亿人都为之买单，实属境界。相信每一个产品经理都有改变世界的梦想，也都在这条不归路上螨跚前行，改变世界的...
How to generate an openSSL key using a passphrase from the command line?
...assword being viewable as a process use a function in a shell script:
get_passwd() {
local passwd=
echo -ne "Enter passwd for private key: ? "; read -s passwd
openssl genpkey -aes-256-cbc -pass pass:$passwd -algorithm RSA -out $PRIV_KEY -pkeyopt rsa_keygen_bits:$PRIV_KEYSIZE
}
...
Remote Connections Mysql Ubuntu
...fective immediately
GRANT ALL ON *.* TO 'user'@'localhost' IDENTIFIED BY 'passwd' WITH GRANT OPTION;
GRANT ALL ON *.* TO 'user'@'%' IDENTIFIED BY 'passwd' WITH GRANT OPTION;
FLUSH PRIVILEGES;
EXIT;
user == the user u use to connect to mysql ex.root
passwd == the password u use to connect to...
How to set proxy for wget?
...I added the following lines in $HOME/.wgetrc
http_proxy = http://uname:passwd@proxy.blah.com:8080
use_proxy = on
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Rails: FATAL - Peer authentication failed for user (PG::Error)
...t know what your postgres user's password is? Change it like this:
1) Run passwd as a superuser:
$ sudo passwd postgres
2) Enter your accounts password for sudo (nothing to do with postgres):
[sudo] password for starkers: myaccountpassword
3) Create the postgres account's new passwod:
Enter ...
MySQL (\'root\'@\'%\') does not exist 的问题 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术
...即可。
解决办法：
登陆mysql ，执行
mysql -u root -pPasswd
mysql >grant all privileges on *.* to root@"%" identified by "Passwd" ;
mysql >flush privileges;MySQL root