nice blog about shepherd cars in FI
http://raddad-racinginfinland.blogspot.com
sobota, 3 maja 2014
wtorek, 1 kwietnia 2014
Power of sfdisk
sfdisk -d /dev/sda > file
cat file | sfdisk /dev/sdb
cat file | sfdisk /dev/sdc
cat file | sfdisk /dev/sdd
;)
maybe ...
cat file | sfdisk /dev/sdb
cat file | sfdisk /dev/sdc
cat file | sfdisk /dev/sdd
;)
maybe ...
czwartek, 27 marca 2014
czwartek, 13 marca 2014
OMG ... vim ... and spaces ...
Simple shot.
File, in file some columns, where one line looks like this (some part from
psql -l -U username)
niet | niet | UTF8
postgres | postgres | UTF8
template0 | postgres | UTF8
template1 | postgres | UTF8
testowa | postgres | UTF8
testowa1 | mzdw | UTF8
testowisko | postgres | UTF8
I need only 1st word from line.
Commands
:1 (move to 1st line)
V (select line)
G (move to end of test and also keep selected)
Then press : (will see this-> :'<,'> )
Type: s/ .*// and press Enter
And all go off ;)
Why ?
Thats why, because 1st character is a space before 'niet, and other dbnames'.
Press u (it will undo changes).
Now, let be a little smart ;) ?????
:1
V
G
:'<,'>s/^ // | '<,'>s/ .*//g
Tap enter and again enter :D
Uff ;)
File, in file some columns, where one line looks like this (some part from
psql -l -U username)
niet | niet | UTF8
postgres | postgres | UTF8
template0 | postgres | UTF8
template1 | postgres | UTF8
testowa | postgres | UTF8
testowa1 | mzdw | UTF8
testowisko | postgres | UTF8
I need only 1st word from line.
Commands
:1 (move to 1st line)
V (select line)
G (move to end of test and also keep selected)
Then press : (will see this-> :'<,'> )
Type: s/ .*// and press Enter
And all go off ;)
Why ?
Thats why, because 1st character is a space before 'niet, and other dbnames'.
Press u (it will undo changes).
Now, let be a little smart ;) ?????
:1
V
G
:'<,'>s/^ // | '<,'>s/ .*//g
Tap enter and again enter :D
Uff ;)
środa, 12 marca 2014
For example, there is two pids, 12344 and 23444 which was 1st?
Last time at job interview I was asked about pids on Linux system.
For example, there is two pids, 12344 and 23444 which was 1st?
At 1st shot pids start from 1 for init then pid grow up, usually per 1 ;)
but nowadays Linux kernel has 'magic' option, which 'mix' pid.
They are not counted step by step ;)
There is some free spaces between pid numbers, some app start, then stop,
kernel works and thinks which pid give.
[root@mail ~]# ps -eo pid,lstart,cmd
PID STARTED CMD
1 Fri Mar 7 09:38:00 2014 init [3]
2 Fri Mar 7 09:38:00 2014 [kthreadd]
3 Fri Mar 7 09:38:00 2014 [ksoftirqd/0]
5 Fri Mar 7 09:38:00 2014 [kworker/0:0H]
------
3942 Fri Mar 7 09:41:47 2014 /usr/sbin/httpd -f /etc/httpd/apache.conf
9727 Mon Mar 10 12:49:14 2014 /sbin/mingetty --noclear tty1
10527 Fri Mar 7 11:36:32 2014 /usr/sbin/sshd
-------
17901 Wed Mar 12 12:14:45 2014 dovecot/pop3-login
17903 Wed Mar 12 12:14:58 2014 ps -eo pid,lstart,cmd
18252 Sat Mar 8 01:40:34 2014 dovecot/auth
22125 Mon Mar 10 05:02:06 2014 /usr/sbin/fcgi- -f /etc/httpd/apache.conf
Whatever ...
For example, there is two pids, 12344 and 23444 which was 1st?
At 1st shot pids start from 1 for init then pid grow up, usually per 1 ;)
but nowadays Linux kernel has 'magic' option, which 'mix' pid.
They are not counted step by step ;)
There is some free spaces between pid numbers, some app start, then stop,
kernel works and thinks which pid give.
[root@mail ~]# ps -eo pid,lstart,cmd
PID STARTED CMD
1 Fri Mar 7 09:38:00 2014 init [3]
2 Fri Mar 7 09:38:00 2014 [kthreadd]
3 Fri Mar 7 09:38:00 2014 [ksoftirqd/0]
5 Fri Mar 7 09:38:00 2014 [kworker/0:0H]
------
3942 Fri Mar 7 09:41:47 2014 /usr/sbin/httpd -f /etc/httpd/apache.conf
9727 Mon Mar 10 12:49:14 2014 /sbin/mingetty --noclear tty1
10527 Fri Mar 7 11:36:32 2014 /usr/sbin/sshd
-------
17901 Wed Mar 12 12:14:45 2014 dovecot/pop3-login
17903 Wed Mar 12 12:14:58 2014 ps -eo pid,lstart,cmd
18252 Sat Mar 8 01:40:34 2014 dovecot/auth
22125 Mon Mar 10 05:02:06 2014 /usr/sbin/fcgi- -f /etc/httpd/apache.conf
Whatever ...
piątek, 7 marca 2014
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