All Questions
1,609
questions
206
votes
11
answers
41k
views
I accidentally typed password into bash command line
I accidentally typed my password into bash command line, mistaking the Last login: ... line for Wrong password (I was in a hurry). What do I do to cover my trace?
What I did was editing .bash_history ...
- 2,013
159
votes
2
answers
316k
views
create tar with multiple directories and file locations
I have some scripts and files located in various locations like:
/etc/dir1
/var/www/html
/home/somedir
I want to make a tar file so that it copies files and folders with the location structure. ...
- 1,693
106
votes
4
answers
479k
views
Checking what PHP version I'm running on Linux?
I'm running Centos 5 and I need to know what version of PHP I'm running, is there a command for this which I can run?
- 3,194
93
votes
4
answers
178k
views
yum install gcc-g++ doesn't work anymore in CentOs 6.4
Today installed CentOs 6.4 fresh new on my workstation.
I wanted to install g++. With my surprise I didn't succeed by using
yum install gcc-g++
The thing is that even by doing a search I don't ...
- 1,775
62
votes
9
answers
205k
views
How to stop kernel messages from flooding my console?
I'm using Centos 6, rsyslog logging. Console is flooded with kernel messages.
Klogd is not running (I'm using rsyslog)
Rsyslog config does not direct anything to the console
Even tried stopping ...
- 22.7k
53
votes
3
answers
115k
views
Difference between ${} and $() in a shell script
$ echo $(date)
Thu Jul 2 16:33:11 SGT 2015
$ echo ${date}
$ name=foo
$ echo $(name)
ksh: name: not found
$ echo ${name}
foo
Seems like ${variable} is the same as $variable, while $() is to execute ...
- 1,625
53
votes
1
answer
97k
views
What is run-parts in /etc/crontab and how do I use it?
I have been digging through my Linux system to try and understand how it all works.
In the /etc/crontab file I see the following:
# run-parts
01 * * * * root run-parts /etc/cron.hourly
02 4 * * * root ...
- 13.7k
49
votes
8
answers
116k
views
How to combine the 'tar' command with 'find'
The find command gives this output:
[root@localhost /]# find var/log/ -iname anaconda.*
var/log/anaconda.log
var/log/anaconda.xlog
var/log/anaconda.yum.log
var/log/anaconda.syslog
var/log/anaconda....
- 4,053
46
votes
7
answers
137k
views
How to automatically run commands on SSH login?
Whenever I login to my Linux server I'd like to have several commands run automatically (set some variables, change location, etc.)
This needs to be done on user login, not on system start.
How can ...
- 867
46
votes
13
answers
188k
views
what causes “systemd: Failed at step USER spawning /usr/sbin/opendkim: No such process”
How can I remove following error:
systemd: Failed at step USER spawning /usr/sbin/opendkim: No such process
It occurs when I try to start opendkim service on Centos.
- 561
43
votes
10
answers
191k
views
How can I add additional search domains to the resolv.conf created by dhclient in CentOS
When my CentOS virtual machine boots it uses DHCP to get an IP address. It also overwrites resolv.conf with the DNS settings provided by the DHCP server. The DHCP server doesn't supply any search ...
- 1,496
42
votes
4
answers
221k
views
Where Linux places the messages of boot?
I want to find place to where Linux writes all boot messages. You know:
facility one [STARTED]
facility two [STARTED]
facility three [FAILED]
I searched with
find . -print0 | xargs -0 grep -...
- 2,209
40
votes
6
answers
140k
views
yum hangs and won't respond
I am running yum check-update and it freezes after a 2 lines of output:
Loaded plugins: fastestmirror
Loading mirror speeds from cached hostfile
I'm not sure what is happening. The last things I ...
- 1,729
36
votes
6
answers
174k
views
How to disable ipv6 on a specific interface in Linux?
Could someone tell me how to disable ipv6 auto-config on a specific network interface in CentOS?
The current situation is:
A PC has two network adapters eth0 and eth1 that are connecting to the same ...
- 473
36
votes
6
answers
79k
views
To use ssh-id-copy do you need both id_rsa.pub and id_rsa?
I am trying to setup a second access ssh key for a friend. He sent me his id_rsa.pub.
ssh-copy-id -i id_rsa.pub [email protected]
/usr/local/bin/ssh-copy-id: ERROR: failed to open ID file './...
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