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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...
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...
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...
Publish to S3 using Git?
...y ID & Secret Access
Key) by one of the following methods:
using the passwd_file command line option
setting the AWSACCESSKEYID and AWSSECRETACCESSKEY environment variables
using a .passwd-s3fs file in your home directory
using the system-wide /etc/passwd-s3fs file
do this
.
/usr/bin/s3fs ...
mac os下如何获得root权限？ - 更多技术 - 清泛网 - 专注C/C++及内核技术
...root权限？操作步骤：1.打开实用工具 －> 终端2.键入sudo passwd root 然后提示你输入当前登录用户密码，通过以后，提示你输入两遍root的密码。...操作步骤：
1.打开实用工具 －> 终端
2.键入sudo passwd root 然后提示你输入当前登录用...
How to create a new database after initally installing oracle database 11g Express Edition?
...me=%app_name%_db
set db_sid=%db_name%_sid
set db_ins=%db_name%_ins
set sys_passwd=x3y5z7
set system_passwd=1x4y9z
set max_log_files=32
set max_log_members=4
set max_log_history=100
set max_data_files=254
set max_instances=1
set version_dir=%ora_dir%\%version%
set db_dir=%version_dir%\%db_name%
se...
Changing default shell in Linux [closed]
...
@ShaktiMalik I believe the configure file is /etc/passwd, but I didn't double check it.
– Summer_More_More_Tea
Feb 11 '14 at 13:18
...
sh: 0: getcwd() failed: No such file or directory on cited drive
... against the wall for a while I've found out, that I've destroyed the /etc/passwd entries by running a custom-made-linux-server-setup-bash-script which worked well previously, but this time the regex within the "sed" command erased all the existing entries :D
After copy pasting the default entries ...
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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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...