symas openldap vs openldap source 2008

7/23/2019 Symas OpenLDAP vs OpenLDAP Source 2008

1/13

Linux Troubleshooting Tricks

Research Computing Support Group

Division of Information Technology

http://www.rcsg.rice.edu/rcsg!rice.edu"

!ricercsg on Twitter

Chandler #il$ersonchwil$!rice.edu
http://www.rcsg.rice.edu/http://www.rcsg.rice.edu/


2/13

Set Up Your Environment

%or &ash users' somegreat twea$s:

(dit )/.&ashrc to addaliases and environmentvaria&les you will useoften

*se envto see yourcurrent environment

+ source )/.&ashrc

# Check for interactive session[ -z "$PS1" ] && return

# Colorize various outputs# see what i' lookin! foreport %PP()*S+,--color+auto,# ake ls colorize ./ file t/pealias ls+"0.in0ls - --color+auto,

alias ll+"0.in0ls -la --color+auto,

# i2 up lesseport 3%SS+"-i2"# ake sure ever/thin! uses lesseport P4%+"less -i2"

# histor/ options# 1st5 6on't put successive5 6uplicate# coan6s in histor/ fileeport 7)S()*%+"&"# 8n65 appen6 each shell's histor/ to /# ain histor/ file on eitshopt -s histappen6


3/13

TAB TAB (Completion)

Save $eystro$es &y using command completion,T- $ey

0earn some &asic &ash su&stitutions

11 repeat the last command

1+ repeat the last command2s last argument

13pat repeat the last command that included 4pat5

16 repeat the command at position 6 in your history


4/13

GE!

7ptions worth $nowing

8i case insensitive

8v reverse match

8c 9ust count matches

8l print filenames only

8r recursive ,searchall files in directory

Contet ,what to print

8- 6 print 6 lines after

8 6 print 6 lines &efore

8C 6 print 6 lines around

8o 7nly print the match


5/13

"#ile" is Your $rien%

# file 9.aau:o; %3 relocata.le5 ?


6/13

&'n%ling Lots o# $iles

%irst piece of advice is don2t generate lots offiles. It &rea$s file systems.

The ls command sorts &y default. *se 8u to

avoid the penalty when directories grow huge


7/13

h is #or &um'n

df

du

ls sort

6 where is my Buota &eing used3

+ du 8h +7;( sort 8h

+ ls 8lh

The following utilities offer the 8h flag to output ,oraccept input in human reada&le format.


8/13

T'ke C're ith S*mlinks

eware of trailing slashes when using rm andsymlin$s

Try the following in a test directory:

$ k6ir a

$ touch a0test:tt

$ ln -s a .

$ ln -s a c$ r -ir .

$ r -ir c0


9/13

+no, *our Linux -istro

It helps to $now someR


10/13

SS& $'ster

Ssh transfers going slowly3 Simplify theencryption overhead.

+ scp 8c arcfour localfile remote:remotefile

*sing rsync3

+ rsync 8e 4ssh 8c arcfour5


11/13

SS& $'ster

Ssh transfers going slowly3 Simplify theencryption overhead.

+ scp 8c arcfour localfile remote:remotefile

*sing rsync3

+ rsync 8e 4ssh 8c arcfour5


12/13

SS& +e*s

ssh8$eygen 8t rsa

*se a password ,and ssh8agent ,;ac' 0inu

ssh8copy8id ,0inu only

#atch the permissions on )/.ssh and +7;(

*se 8- to forward ,tunnel your agent


13/13

SS& .ptions

Commonly used options can go in )/.ssh/config

See the sshEconfig man page for options

7ashGnown7osts /es # .scures where /ou ssh

7ost 9:rice:e6u # Hil6car6 host stanza

Iser /*et)J # 4voi6s -l or /*et)JKorwar6211(ruste6 /es # autoaticall/ inclu6e -A

symas openldap vs openldap source 2008

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