Random Notes
Table of Contents
Sublime plugins for markdown:
https://github.com/jonschlinkert/sublime-monokai-extended
https://github.com/jonschlinkert/sublime-markdown-extended
https://github.com/math2001/MarkdownLivePreview
RHEL 7 Password reset
Test if ssh is setup on host
ssh -q -o "BatchMode=yes" server01 "echo 2>&1" && echo $host SSH_OK || echo $host SSH_NOK
Backend shortcut keys to enable
echo '### Terminal Shortcuts Original file is in /etc/inputrc
"\C-p":previous-history
"\C-n":next-history
"\C-a":beginning-of-line
"\C-e":end-of-line
"\C-l":clear-screen' >> ~/.inputrc &&
cat ~/.inputrc && bash
Curl from sftp
curl -k "sftp://company.com/myfile.txt" --user "<username>" -o /root/myfile.txt
Curl for ftp
curl -u <username> 'ftp://company.com/myfile.txt' -o /root/myfile.txt
Check for stuck deleted files
lsof -nP +L1
cut something out with delimiter ( example delimiter:)
cat file.txt | cut -d: -f2 # cuts all but field 2 or -f2- cuts only fields before 2
Vim Align all columns
%!column -t
or do in visual mode then just :'<,'>!column -t (<> will appear auto)
Vim fix pasting open .vimrc
let &t_SI .= "\<Esc>[?2004h"
let &t_EI .= "\<Esc>[?2004l"
inoremap <special> <expr> <Esc>[200~ XTermPasteBegin()
function! XTermPasteBegin()
set pastetoggle=<Esc>[201~
set paste
return ""
endfunction
Check for immutable flag on files
lsattr -R | grep +i
View network interfaces
ip addr
show established connection on tcp/ip with ports
ss -tan
show eth interface statistics
ip -s link show <interface>
lookup how system looks at hosts info ( networking dns etc)
getent hosts <hostname>
View system journal logs
journalctl
To Install xsosx
curl -Lo /usr/local/bin/xsos bit.ly/xsos-direct
chmod +x /usr/local/bin/xsos
Boot DB in restricted mode
Shutdown immediate;
Startup restrict;
LIST ALL FILESYSTEMS ABOVE 80%
df -Ph | awk '0+$5 >= 80 {print}'
SCP A FILE WHEN THERE IS NO RSA KEY
/usr/bin/scp -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null file1.txt root@nodename:/tmp
LIST ALL FILES IN DIRECTORY AND SORT BY SIZE
du -hs * | sort -h
rhel 7+ tmux 1.8 config
# rhel 7+ tmux 1.8 config
# config file location > ~/.tmux.conf
# Make mouse useful in copy mode
setw -g mode-mouse on
# Allow mouse to select which pane to use
set -g mouse-select-pane on
# Allow xterm titles in terminal window, terminal scrolling with scrollbar
set -g default-terminal "xterm-256color"
set -g xterm-keys on
set -g terminal-overrides "xterm*:XT:smcup@:rmcup@:"
# Scroll History
set -g history-limit 30000
# Lower escape timing from 500ms to 50ms for quicker response to scroll-buffer access.
set -s escape-time 50
CHECK SQL TABLESPACE SIZE 1st number current size 2nd will extend to size
select file_name, bytes/1024/1024/1024, maxbytes/1024/1024/1024 from dba_data_files where tablespace_name='DATA';
select file_name, bytes/1024/1024/1024, maxbytes/1024/1024/1024 from dba_data_files where tablespace_name='DATA';
To test if sql can write to a file on backend
declare
f utl_file.file_type;
begin
f := utl_file.fopen ('TEST', 'test.txt', 'w');
utl_file.put_line(f, 'test');
utl_file.fclose(f);
end;
/
List all *.c file accessed 30 days ago
find / -iname "*.c" -atime -30 -type f -ls
To see all files accessed on the 25/Sep/2017
find . -type f -newerat 2017-09-25 ! -newerat 2017-09-26 -ls
-newerXY option for find command
find /dir/ -type f -newerXY 'yyyy-mm-dd'
find /dir/ -type f -newerXY 'yyyy-mm-dd' -ls
newer options see above newerat = a t options
a – The access time of the file reference
B – The birth time of the file reference
c – The inode status change time of reference
m – The modification time of the file reference
t – reference is interpreted directly as a time
find and remove files
find /directory/ -type f -mtime +7 -exec rm -f {} \; -print
find / -maxdepth 1 -type f -mtime +1 -mtime -31 -name 'emar*.pdf' -ls -exec rm {} \;
