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Offending TCP Blocker

netstat -Aan | grep 3141
f100060002134398 tcp4       0      0  127.0.0.1.3141     127.0.0.1.64501    CLOSE_WAIT
f100060002282b98 tcp        0      0  127.0.0.1.64501    127.0.0.1.3141     FIN_WAIT_2
f1000600024cd398 tcp        0      0  *.3141             *.*                LISTEN
f100060001f36398 tcp4       0      0  10.75.1.147.3141   10.75.2.107.4268   ESTABLISHED

rmsock f1000600024cd398 tcpcb
The socket 0x24cd008 is being held by proccess 1675400 (java).

ps -ef|grep 1675400

TCP Port with ubuntu

netstat -pano
tcp        0      0 127.0.0.1:6342          0.0.0.0:*               LISTEN      6351/megasync        off (0.00/0/0)
tcp        0      0 0.0.0.0:8084            0.0.0.0:*               LISTEN      1323/mono            off (0.00/0/0)
tcp        0      0 127.0.0.53:53           0.0.0.0:*               LISTEN      787/systemd-resolve  off (0.00/0/0)
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      1501/sshd            off (0.00/0/0)
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      5258/cupsd           off (0.00/0/0)

Allow greater size for vi file under AIX

export EXINIT="set ll=20000000"
export EXINIT="set ll=20000000 dir=/tmp"

User & Group Manipulation

groupadd mynewgroup #Create a new group
usermod -a -G examplegroup exampleusername # add exampleusername to the group examplegroup

Copy vs rsync

rsync -avhW --no-compress --progress /src/ /dst/
#Here's my reasoning:
# -a is for archive, which preserves ownership, permissions etc.
# -v is for verbose, so I can see what's happening (optional)
# -h is for human-readable, so the transfer rate and file sizes are easier to read (optional)
# -W is for copying whole files only, without delta-xfer algorithm which should reduce CPU load
# --no-compress as there's no lack of bandwidth between local devices
# --progress so I can see the progress of large files (optional)

Prevent cp to ask for overwrite in script

By default cp is aliased as cp -i and -f is not preventing -i so Jenkins scripts could fail, you can force to use the not aliased version by running \cp instead of cp.

Reset password AIX

passwd <UserName>
chuser unsuccessful_login_count=0 <UserName>
chuser account_locked=false <UserName>
lsuser -a account_locked <UserName>