linux_cmd.md

• Terminal color and format
• ack
• grep
• find files according to time
• convert time stamp to date and inverse
• cscope and ctags

set Linux Terminal command color and format

edit ~/.bashrc
PS1='[\033[1;32;1m]\u:\W \t$[\033[1;37;1m] '

ack

ack image_tag --ignore-file=ext:out --ignore-dir=build64_debug
ack image_tag --ignore-file='match:/tags|cscope.*/' --ignore-dir=build64_release

grep

grep -C 3 "match_pattern" file_name --color=auto

find files according to time

find . -type f -atime +7
find . -type f -amin -10

convert time stamp to date and inverse

date +%s
date -d '2017-1-4 17:08' +%s
date -d @1483520880
date -d @1483520880 +"%Y-%m-%d %H:%M:%S"

cscope and ctags

find . -regex ".*\.\(h\|cpp\|cc\)" > cscope.files
find -E . -regex '.*(h|hpp|cpp|cc)$' > cscope.files (in BSD)
cscope -bkq -i cscope.files
ctags -L cscope.files
usage for ctag
:tag {ident} "jump to ident tag
:tags "show tag stack
:ts "show all tags found
:tp "show previous tag
:tn "show next tags
shortcut
Ctrl+t "return the last place
Ctrl+] "jump to the tag place