iB::Topic::add strace / lsof

	Damn Small Linux :: Damn Small Linux Board The DSL Forums

» Welcome Guest
[ Log In :: Register ]

Damn Small Linux Board » Damn Small Linux » DSL Ideas and Suggestions » add strace / lsof

		Mini-ITX Boards Sale, Fanless BareBones Mini-ITX, Bootable 1G DSL USBs, 533MHz Fanless PC <-- SALE $200 each!
		Get The Official Damn Small Linux Book. DSL Market , Great VPS hosting provided by Tektonic

[ Track this topic :: Email this topic :: Print this topic ]

Topic: add strace / lsof, request for prgram to add

< Next Oldest | Next Newest >

haveaniceday Offline

Group: Awaiting Authorisation
Posts: 6
Joined: Nov. 2005

Posted: Nov. 22 2005,10:32

Hi,
I often use strace and lsof for analysis.
strace can be used to find missing files/libraries and trace system calls.
lsof is very beatiful to analyse connection and file usage.
Both together should be compresses less than 150 kB.

Please include to DSL if this space is available.
An alternativ solution might be to provide a special package.

Best regards,

Haveaniceday

vees

Group: Members
Posts: 81
Joined: Nov. 2005

Posted: Nov. 23 2005,01:32

Quote (haveaniceday @ Nov. 22 2005,05:32)

Hi there!

Strace and lsof are among my favorite tools also. But on a live-CD does it make sense trace/debug the execution of an application which you cannot do anything about? I am not sure about that. How do you monitor a connection with lsof? (I never tried that)

Cheers,

VS

--------------
Motto: chown -R linux:GNU world

haveaniceday Offline

Group: Awaiting Authorisation
Posts: 6
Joined: Nov. 2005

Posted: Nov. 24 2005,12:08

strace makes sense also on a life CD if features/programs does not work
correct. You might see which configuration/settings are accessed and not
found.

lsof shows e.g. TCP connection. See "Established" below.

Code Sample

sshd 668 root mem REG 240,0 40752 2104496 /KNOPPIX/lib/security/pam_unix.so
sshd 668 root mem REG 240,0 4180 2103154 /KNOPPIX/lib/security/pam_motd.so
sshd 668 root mem REG 240,0 18668 1729984 /KNOPPIX/lib/libcrypt-2.3.2.so
sshd 668 root mem REG 240,0 10332 2101842 /KNOPPIX/lib/security/pam_env.so
sshd 668 root mem REG 240,0 8176 2102888 /KNOPPIX/lib/security/pam_mail.so
sshd 668 root mem REG 240,0 11772 2102620 /KNOPPIX/lib/security/pam_limits.so
sshd 668 root mem REG 240,0 11600 1728792 /KNOPPIX/lib/libcap.so.1.10
sshd 668 root mem REG 240,0 13896 1733944 /KNOPPIX/lib/libnss_dns-2.3.2.so
sshd 668 root mem REG 240,0 64844 1737748 /KNOPPIX/lib/libresolv-2.3.2.so
sshd 668 root mem CHR 1,5 413 /dev/zero
sshd 668 root 0u CHR 1,3 214 /dev/null
sshd 668 root 1u CHR 1,3 214 /dev/null
sshd 668 root 2u CHR 1,3 214 /dev/null
sshd 668 root 3r FIFO 0,5 9372 pipe
sshd 668 root 4u IPv4 9360 TCP 192.168.168.5:ssh->89.77.10.11:11783 (ESTABLISHED)
sshd 668 root 5w FIFO 0,5 9372 pipe
sshd 668 root 6u CHR 5,2 220 /dev/ptmx
sshd 668 root 7u CHR 5,2 220 /dev/ptmx
sshd 668 root 8u CHR 5,2 220 /dev/ptmx

Haveaniceday