Count number of bytes in multiple directories

I have been busy moveing (scp-ing/reorganising) large numer of databases over the network, this little awk script makes me able to count the number of bytes and thus check if my nighlty scp’s didn’t miss a byte. (or two)

/cygdrive/c/oracle/oradata/DB01/DB01
$ find . -name "*DBF" -exec ls -l {} \;
-rwxrwx--- 1 Administrators SYSTEM 10493952 Oct  9 16:49 ./DB01/DATAFILE/O1_MF_TEST_3HSWQYNH_.DBF
-rwxrwx--- 1 Administrators SYSTEM 104865792 Oct  9 16:49 ./EXAMPLE01.DBF
-rwxrwx--- 1 Administrators SYSTEM 293412864 Oct  9 16:49 ./P1PERG001.DBF
-rwxrwx--- 1 Administrators SYSTEM 104865792 Oct  9 16:49 ./P1PERG002.DBF
-rwxrwx--- 1 Administrators SYSTEM 272637952 Oct 13 08:34 ./SYSAUX01.DBF
-rwxrwx--- 1 Administrators SYSTEM 513810432 Oct  9 16:49 ./SYSTEM01.DBF
-rwxrwx--- 1 Administrators SYSTEM 20979712 Oct 13 08:36 ./TEMP01.DBF
-rwxrwx--- 1 Administrators SYSTEM 47194112 Oct  9 16:49 ./UNDOTBS01.DBF
-rwxrwx--- 1 Administrators SYSTEM 5251072 Oct  9 16:49 ./USERS01.DBF
 
/cygdrive/c/oracle/oradata/DB01/DB01
$ find . -name "*DBF" -exec ls -l {} \; | awk '
> BEGIN { BYTES = 0 }
> { BYTES = BYTES + $5 }
> END { print "Total number of bytes = " BYTES}'
Total number of bytes = 1373511680
 
/cygdrive/c/oracle/oradata/DB01/DB01
$
 

Even shorter.

find /m*/oradata/ai018001/ -name "*dbf" -exec ls -l {} \; | awk '{B+=$5} END {print B}'
 

Display only directories in current directory

/cygdrive/c/temp $ ls -ld */
drwxr-xr-x+ 2 rz4tlj mkgroup-l-d 0 Sep 18 07:50 _backup_18-SEP-2007/
 
/cygdrive/c/temp $ 

send file as attachment

Use uuencode to encode a file and pipe it to mailx to be send as attachment (when you quickly need a file on your desktop it’s faster then ftp…)

uuencode file to mailx

$ uuencode file.txt file.txt | mailx -s file.txt <your-email-address>
$ 

In my environment the -r flag (return address) is needed since my mailserver is blocking mail without a known email address reply header.

uuencode file to mailx with -r flag

$ uuencode file.txt file.txt | mailx -s file.txt -r <your-email-address> <your-email-address>
$ 

Download

Go to http://java.sun.com/javase/downloads/index.jsp and download the desired file.

Extract the .bin file

[root@localhost tmp]# chmod 755 j2re-1_4_2_15-linux-i586-rpm.bin
[root@localhost tmp]# ./j2re-1_4_2_15-linux-i586-rpm.bin

Install the .rpm file

[root@localhost tmp]# rpm -Uvh j2re-1_4_2_15-linux-i586.rpm
Preparing...                ########################################### [100%]
   1:j2re                   ########################################### [100%]
 

Adjust environment

Finally add the path to the java executable in the /etc/profile file.

Test

$ java -version
java version "1.6.0_02"
Java(TM) SE Runtime Environment (build 1.6.0_02-b05)
Java HotSpot(TM) Client VM (build 1.6.0_02-b05, mixed mode, sharing)

View symbolic links

In my environment a symbolic link is created in /usr/bin/java which points to /usr/java/default/bin/java.

$ which java
/usr/bin/java
$ ls -la /usr/bin/java
lrwxrwxrwx 1 root root 26 Jul 31 14:38 /usr/bin/java -> /usr/java/default/bin/java
$ ls -la /usr/java/
total 40
drwxr-xr-x  4 root root 4096 Jul 31 14:38 .
drwxr-xr-x 14 root root 4096 Jun 14 21:03 ..
lrwxrwxrwx  1 root root   16 Jul 31 14:38 default -> /usr/java/latest
drwxr-xr-x  7 root root 4096 Jul 31 14:16 j2re1.4.2_15
drwxr-xr-x  9 root root 4096 Jul 31 14:38 jdk1.6.0_02
lrwxrwxrwx  1 root root   21 Jul 31 14:38 latest -> /usr/java/jdk1.6.0_02
$
 

nohup and SQL*Plus

Nohup and SQL*Plus can be easily used together:

$ nohup sqlplus -s remi/remivisser @update.sql &
[4]     14433
$ Sending output to nohup.out
 
$
$

Prevent password from being displayed in the ps list

$ export password=remivisser
$ nohup sqlplus -s remi/${password} @update.sql &
[8]     16768
$ Sending output to nohup.out
$
$
 

Enable YUM behind a Proxy Server

To enable yum behind a proxy server add the http_proxy environment variable to you shell:

$ export http_proxy='http://<username>:<password>@<proxyserver>:<port>'
 

yum update

Below is the logging of a ‘yum update’ session.

[root@localhost ~]# yum update
Loading "installonlyn" plugin
Setting up Update Process
Setting up repositories
base                      100% |=========================| 1.1 kB    00:00
updates                   100% |=========================|  951 B    00:00
addons                    100% |=========================|  951 B    00:00
extras                    100% |=========================| 1.1 kB    00:00
Reading repository metadata in from local files
primary.xml.gz            100% |=========================| 249 kB    00:01
updates   : ################################################## 552/552
Added 25 new packages, deleted 0 old in 0.76 seconds
primary.xml.gz            100% |=========================|  62 kB    00:00
extras    : ################################################## 233/233
Added 5 new packages, deleted 0 old in 0.21 seconds
Resolving Dependencies
--> Populating transaction set with selected packages. Please wait.
---> Downloading header for cups to pack into transaction set.
cups-1.2.4-11.5.3.el5.i38 100% |=========================| 162 kB    00:00
---> Package cups.i386 1:1.2.4-11.5.3.el5 set to be updated
---> Downloading header for cups-libs to pack into transaction set.
cups-libs-1.2.4-11.5.3.el 100% |=========================|  38 kB    00:00
---> Package cups-libs.i386 1:1.2.4-11.5.3.el5 set to be updated
--> Running transaction check
 
Dependencies Resolved
 
=============================================================================
 Package                 Arch       Version          Repository        Size
=============================================================================
Updating:
 cups                    i386       1:1.2.4-11.5.3.el5  updates           2.7 M
 cups-libs               i386       1:1.2.4-11.5.3.el5  updates           178 k
 
Transaction Summary
=============================================================================
Install      0 Package(s)
Update       2 Package(s)
Remove       0 Package(s)
 
Total download size: 2.9 M
Is this ok [y/N]: y
Downloading Packages:
(1/2): cups-1.2.4-11.5.3. 100% |=========================| 2.7 MB    00:05
(2/2): cups-libs-1.2.4-11 100% |=========================| 178 kB    00:00
Running Transaction Test
Finished Transaction Test
Transaction Test Succeeded
Running Transaction
  Updating  : cups-libs                    ######################### [1/4]
  Updating  : cups                         ######################### [2/4]
  Cleanup   : cups                         ######################### [3/4]
  Cleanup   : cups-libs                    ######################### [4/4]
 
Updated: cups.i386 1:1.2.4-11.5.3.el5 cups-libs.i386 1:1.2.4-11.5.3.el5
Complete!
[root@localhost ~]#
 

I can not get Centos 5.0 installed, I choose, Red Hat Enterprise Linux 4 as the ‘Guest Operating System’ the boot starts fine, but after a while the kernel panic errors appear and the install freezes.

Solution (workaround)

As I did not have the time to sort this one out, I downloaded a preconfigured VM Machine CentOS 5.0 server install from thoughtpolice.co.uk, http://www.thoughtpolice.co.uk/vmware/#centos5.0 (ziparchive is 399M, extracted it is 8G). This one is running stable now, thank you thought police! Saved my day.

Screen Captures

import from compressed export file

Example below demonstrates how to import ‘directly’ from a compressed file. Handy when you have not enough space on your mountpoint to unpack the file.

mknod pipe_db01 p
 
zcat exp.dmp.Z > pipe_db01 &
 
sleep 3
 
imp / file=pipe_db01 ... 
 

Same as above but now for the other compression utilities.

(win)zip

unzip -p exp.dmp.zip > pipe_db01 &

gzip

gunzip < exp.dmp.gz > pipe_db01 &
 
gzip -cNf < pipe_db01 > exp.dmp.Z &
gunzip -c exp.dmp.Z > pipe_db01 &

cpio

cpio -icvdu < exp.dmp.cpio > pipe_db01 &

The other way around

Export to pipe and compress.

$ mknod c.pipe p
$ nohup compress < c.pipe > exp_DB01_2007-10-31.dmp.Z & 
$ nohup exp system/$(cat .pwd) file=c.pipe owner=inotime log=exp_DB01_2007-10-31.log & 
 

Install (download) telnet

Install telnet with the apt-get utility as shown below:

$ apt-get install telnetd

Configure telnet

Upon install the telnet server is enabled

$ cat /etc/inetd.conf

To start telnet server issue command below.

$ /usr/sbin/in.telnetd
$
$ netstat -a | grep telnet

Find/Remove old files

Find files modified more then 365 days ago;

find . -mtime +365 -exec ls -l {} \;

Use touch to test

$ touch -t 197801130300 oldfile
$ find . -mtime +365 -exec rm {} \;
$ ls oldfile
ls: oldfile: No such file or directory