(cc) Tin Ho. See main page for copyright info.
crontab show cron jobs
-l = list
-e = edit
-r = remove (no confirmation, everything gone for the user!!)
# file format:
# minute hour day-of-month month day-of-week0=sun cmdline
# 0-59 0-23 1-31 1-12 0-6 echo "Hello World!"
newgrp groupname # change the default group user will create file as
# only last for current session
# Can prompt for password if group is password protected?
-h = brief help, no man pages needed. -r = recursive -l1 = depth level, default to 5 --no-parent = don't bother with ref to parrent dir (-np) -A.gif = download only .gif files -c = continue previous interrupted downlooad -nc = no clobber of existing files -b = process job in background, returninng to prompt --passive-ftp = use passive ftp -k = change link ( convert non-relative llinks to relative) -m = mirror site options, eg, download ffile only if newer. -l=20 = retrieve to depth = 20 --http-user=USER = web page with user/logiin req --http-passwd=PASS --convert-links = convert the downloaded html link to local files -Pdownloaddir = place downloaded file in downloaddir instead of the www.server.com/ name. eg download only *.gif files from server wget -r -l1 --no-parent -A.gif http://www.server.com/dir/ eg2, ftp with username and password as username:password@site: wget ftp://hniksic:mypassword@unix.server.com/mydir eg3: download ibm patches, which is dir with set of links. wget --glob=on --retr-symlinks --level=1 ftp://service.boulder.ibm.com/aix/fixes/pkgs/p3dia/* eg4: getting suse linux from ftp site: wget -r -m -np -c -l10 ftp://ftp.oregonstate.edu/pub/suse/suse/i386/8.2/ wget obeys robot rules. in file /robot.txt If proxy is mandatory, set the proxy server thru env var http_proxy and ftp_proxy. eg: setenv http_proxy "http://proxy.nova.org:8080" export ftp_proxy="http://proxy.nova.org:8080" If auth is req, wget has parameters to submit these also.
rsync -avul source /path/to/destination
sync ./source to /path/to/destination
source or destination could be NFS mounted location.
only newer files in local dir will be copied to dest
if dest has newer file, they will not be changed.
-a archive mode, preserve sym link, attributes, owner/perm, etc.
-n dry run, use w/ -v and will list files that will be cp'ed
w/o actually doing it.
-l copy sym link as sym link (like tar)
-L copy file refered by the sym link
-z use compression during transfer (when used with remote host)
--delete delete files in dst that is not in source
Use this to sync/backup user /home during migration
--preogress show progress (useful when not in -v?)
rsync -avuL /f /cygdrive/p/backup_of_master_data_DrvF
cmd used at home in win2003 to backup all data to removeble ide drv.
does not support funky chinese mp3 filename :(
rsync -avl -e ssh --rsync-path=/usr/local/bin/rsync remote-svr:/dir/* ./local/storage
use ssh as transfer protocol with remote machine
allow specification of where rsync is located on remote host
either source or destination machine could be a server: kind of entry
screen work as usual ctrl-a,d = detach crtl-a,x = lock keyboard ctrl-a,? = help screen -r = resume screen -w = list screens screen -d -rreatach remote and retach here ctrl-a,c = create new window ( or enter screen w/in an existing screen window) ctrl-a,n = switch to next window ctrl-a,p = switch to prev window ctrl-a,w = show list of window ctrl-a,' ctrl-a," = prompt for window name or number to switch to ctrl-a,0 = switch to window number 0 (to 9, enter - for blank window) ctrl-a, A = prompt for a title name for current window ctrl-a, N = show number and title of current window ctrl-a, k = kill current window ctrl-a, S = create split window mode ctrl-a, ^I= move focust to next split window (^I=TAB). ctrl-a, [ = history, allow scroll back, but really for cutting text into buffer. Enter marks begin pt, move around. Enter again marks end pt. ctrl-a,a = send ctrl-a to the terminal ctrl-a,tab= switch input focus to next region ctrl-a,ctrl-b= send a break
co -lcheck out file (with lock) from rcs sys co -r check out revision or the latest verstion, will prompt to overwrite co -l files (at least then when you do ci, it will say file not changed and effectively reversed to original content) ci put file back into rcs ci -u (the -u leave a read only copy of the file, as if run co immediately after ci, always use it:)) rlog display rcs edit log rcsdiff display diff b/w current file content and its previous version rcsdiff -r1.1 display diff b/w current file and version 1.1 of the file rcs -u forces an unlock a file locked by some other user. rcs -aUID FILE add access for user UID to the FILE (but didn't work, maybe file need to be group writable).