14 Sep 2011 Windows grep command alternative
grep is a linux console command to print lines matching a line, but Windows does not have the grep command.
In Windows you have to use the findstr command in a console window.
Example
C:\>dir |findstr Windows 13.09.2011 10:41Windows
The findstr command is default case sensitive just like in linux.
findstr options
C:\>findstr -?
Searches for strings in files.
FINDSTR [/B] [/E] [/L] [/R] [/S] [/I] [/X] [/V] [/N] [/M] [/O] [/P] [/F:file]
[/C:string] [/G:file] [/D:dir list] [/A:color attributes] [/OFF[LINE]]
strings [[drive:][path]filename[ ...]]
/B Matches pattern if at the beginning of a line.
/E Matches pattern if at the end of a line.
/L Uses search strings literally.
/R Uses search strings as regular expressions.
/S Searches for matching files in the current directory and all
subdirectories.
/I Specifies that the search is not to be case-sensitive.
/X Prints lines that match exactly.
/V Prints only lines that do not contain a match.
/N Prints the line number before each line that matches.
/M Prints only the filename if a file contains a match.
/O Prints character offset before each matching line.
/P Skip files with non-printable characters.
/OFF[LINE] Do not skip files with offline attribute set.
/A:attr Specifies color attribute with two hex digits. See "color /?"
/F:file Reads file list from the specified file(/ stands for console).
/C:string Uses specified string as a literal search string.
/G:file Gets search strings from the specified file(/ stands for console).
/D:dir Search a semicolon delimited list of directories
strings Text to be searched for.
[drive:][path]filename
Specifies a file or files to search.
Use spaces to separate multiple search strings unless the argument is prefixed
with /C. For example, 'FINDSTR "hello there" x.y' searches for "hello" or
"there" in file x.y. 'FINDSTR /C:"hello there" x.y' searches for
"hello there" in file x.y.
Regular expression quick reference:
. Wildcard: any character
* Repeat: zero or more occurrences of previous character or class
^ Line position: beginning of line
$ Line position: end of line
[class] Character class: any one character in set
[^class] Inverse class: any one character not in set
[x-y] Range: any characters within the specified range
\x Escape: literal use of metacharacter x
\ Word position: end of word
For full information on FINDSTR regular expressions refer to the online Command
Reference.
Posted by Hans-Henry Jakobsen
25 Feb 2008 My 10 most used linux commands
This is a oneliner bash command to determine my 10 most used linux commands according to my history file
history | awk '{CMD[$2]++;count++;}END { for (a in CMD)print CMD[a] " " CMD[a]/count*100 "% " a;}' | grep -v "./" | column -c3 -s " " -t | sort -nr | nl | head -n10
The result
1 188 37.6% vi
2 38 7.6% ls
3 24 4.8% cat
4 22 4.4% apt-get
5 12 2.4% date
6 11 2.2% tail
7 11 2.2% cd
8 10 2% rm
9 10 2% man
10 9 1.8% basename
It looks like i use vim a lot on my home server. You should try it yourself and see what commands you use the most.
Source: http://linux.byexamples.com
Tags: awk, bash, count, grep, head, nl, sort
Posted by Hans-Henry Jakobsen
21 Feb 2008 Apache web connections pr hour
This is a bash oneliner to show Apache web connections pr hour. It lists up the IPs that has accessed your webserver and the amount og accesses.
# cat /var/log/apache2/access_log_pario.no | grep "21/Jan/2008:.." | awk {' print $4":"$1 '} | sed 's/\[//g' | awk -F : {' print $1":"$2"\t\t"$5 '} | sort | uniq -c
Example output
37 21/Jan/2008:00 192.168.0.10
This shows that I had 37 hits from 00:00 – 01:00 in 20th February 2008.
Tags: Apache, awk, bash, grep, sed
Posted by Hans-Henry Jakobsen
04 Dec 2007 Strip the kernel to contain only needed modules
This is a great page with som nice bash scripts describing how to remove unwanted modules from your kernel.
Tags: bash, cut, grep, kernel, lsmod, modinfo, sed, xargs
Posted by Hans-Henry Jakobsen
18 Nov 2007 Backup mysql databases into separate files
This bach script makes separate backup files of all the databases in mysql and saves the result in the mysql_backup folder.
#!/bin/bash -v
USERNAME='yourusername'
PASSWORD='yourpassword'
HOSTNAME='yourhostname'
BackupFolder='/backup'
for i in $(echo 'SHOW DATABASES;' | mysql --user $USERNAME -p$PASSWORD -h $HOSTNAME | grep -v '^Database$' ); do
mysqldump --user $USERNAME -p$PASSWORD -h $HOSTNAME --opt $i > $BackupFolder/$i.sql;
done;
Remember to change the -h, -p and -h switch according to your needs and avoid space between -p and the password variable.
Tags: backup, bash, Database, grep, MySQL, mysqldump
Posted by Hans-Henry Jakobsen
