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Awk学习笔记 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...(~)
10. 比较表达式
11. 范围模板
12. 一个验证passwd文件有效性的例子
13. 几个实例
14. awk编程
14.1. 变量
14.2. BEGIN模块
14.3. END模块
14.4. 重定向和管道
14.5. 条件语句
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How to gzip all files in all sub-directories into one compressed file in bash
...d how things are tarred up/extracted, for example if I run
cd ~
tar -cvzf passwd.tar.gz /etc/passwd
tar: Removing leading `/' from member names
/etc/passwd
pwd
/home/myusername
tar -xvzf passwd.tar.gz
this will create
/home/myusername/etc/passwd
unsure if all versions of tar do this:
Remo...
Http Basic Authentication in Java using HttpClient?
... HttpGet httpGet = new HttpGet("https://httpbin.org/basic-auth/user/passwd");
String encoding = DatatypeConverter.printBase64Binary("user:passwd".getBytes("UTF-8"));
httpGet.setHeader("Authorization", "Basic " + encoding);
HttpResponse response = Client.execute(httpGe...
Most Pythonic way to provide global configuration variables in config.py? [closed]
...lding them with lambda functions to reduce code. Like this:
User = lambda passwd, hair, name: {'password':passwd, 'hair':hair, 'name':name}
#Col Username Password Hair Color Real Name
config = {'st3v3' : User('password', 'blonde', 'Steve Booker'),
'blubb' : User('123...
Using OpenSSL what does “unable to write 'random state'” mean?
... it is on most systems. You can check www-data's home folder with cat /etc/passwd | grep www-data)
– Nick
Feb 15 '17 at 14:28
1
...
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...
Confused about stdin, stdout and stderr?
... these files can be easily redirected from the shell, like this:
cat /etc/passwd > /tmp/out # redirect cat's standard out to /tmp/foo
cat /nonexistant 2> /tmp/err # redirect cat's standard error to /tmp/error
cat < /etc/passwd # redirect cat's standard input to /etc/pass...
How can I suppress all output from a command using Bash?
...o assign the result of a command to a variable:
$ DUMMY=$( grep root /etc/passwd 2>&1 )
$ echo $?
0
$ DUMMY=$( grep r00t /etc/passwd 2>&1 )
$ echo $?
1
Since Bash and other POSIX commandline interpreters does not consider variable assignments as a command, the present command's retu...
How to generate an openSSL key using a passphrase from the command line?
...assword being viewable as a process use a function in a shell script:
get_passwd() {
local passwd=
echo -ne "Enter passwd for private key: ? "; read -s passwd
openssl genpkey -aes-256-cbc -pass pass:$passwd -algorithm RSA -out $PRIV_KEY -pkeyopt rsa_keygen_bits:$PRIV_KEYSIZE
}
...
How To Set Up GUI On Amazon EC2 Ubuntu server
... the GUI
Create new user with password login
sudo useradd -m awsgui
sudo passwd awsgui
sudo usermod -aG admin awsgui
sudo vim /etc/ssh/sshd_config # edit line "PasswordAuthentication" to yes
sudo /etc/init.d/ssh restart
Setting up ui based ubuntu machine on AWS.
In security group open port 59...