git merge remote master in to branch

git checkout feature/branch_name

git merge origin/master

Change remote repo in git

git remote –v                             # this will show you they old url
git remote remove origin
git remote add origin ssh://git@test.github.com/test/test.git
git push --set-upstream origin master

SSH escape squences

Hit Return and then tilde

[root@local ~]# ~?
Supported escape sequences:
 ~.   - terminate connection (and any multiplexed sessions)
 ~B   - send a BREAK to the remote system
 ~C   - open a command line
 ~R   - request rekey
 ~V/v - decrease/increase verbosity (LogLevel)
 ~^Z  - suspend ssh
 ~#   - list forwarded connections
 ~&   - background ssh (when waiting for connections to terminate)
 ~?   - this message
 ~~   - send the escape character by typing it twice
(Note that escapes are only recognized immediately after newline.)

Trace file access by Process ID

strace -f -e trace=file -p 11313 -o /tmp/somefile.txt

Change remote display resolution

xrandr
cvt 2560 1440 60
xrandr --newmode 2560x1440 312.25  2560 2752 3024 3488  1440 1443 1448 1493 -hsync +vsync
xrandr --addmode default 2560x1440
xrandr --output default --mode 2560x1440

Opensnoop

sudo opensnoop -n java -e

Finding blocked sessions in oracle

select s1.username || '@' || s1.machine
|| ' ( SID=' || s1.sid || ' ) is blocking '
|| s2.username || '@' || s2.machine || ' ( SID=' || s2.sid || ' ) ' AS blocking_status
from v$lock l1, v$session s1, v$lock l2, v$session s2
where s1.sid=l1.sid and s2.sid=l2.sid
and l1.BLOCK=1 and l2.request > 0
and l1.id1 = l2.id1
and l2.id2 = l2.id2 ;

select SID||','||SERIAL# from v$session where sid = 20

alter system kill session '20,35205'