$HOME/Libarary/Application Support/<appName>/logs
Tyler Estes estysdesu
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| ##### `find` (TREE SEARCH; SLOWER) ##### | |
| # https://math2001.github.io/post/bashs-find-command/ | |
| ##### `locate` (DB SEARCH; FASTER; POSSIBLY WRONG) ##### | |
| # https://www.howtoforge.com/linux-locate-command/ |
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| ##### make/shell VARIABLES ##### | |
| # $(<var>): reference make variable | |
| # ${<var>}: reference environment variable | |
| x = `pwd`; echo $(x) | |
| y = ${PATH} | |
| ##### `=`/`:=`/`?=`/`+=` (VARIABLE ASSIGNMENT) ##### | |
| # https://stackoverflow.com/questions/448910/what-is-the-difference-between-the-gnu-makefile-variable-assignments-a | |
| # `=`: evaluated when used, not declared (lazy set); setting of a variable where values within it are recursively expanded when the variable is used | |
| # `:=`: evaluated immediately (immediate set); setting of a variable with simple expansion of the values inside |
estysdesu
/ background.sh
Last active
March 25, 2020 20:31
[Shell: Foreground <--> Background] #sh #fg #bg
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| # https://askubuntu.com/questions/8653/how-to-keep-processes-running-after-ending-ssh-session -- nohup, disown | |
| ##### `&` (BACKGROUND) ##### | |
| # foreground task (blocking) | |
| ping localhost > /dev/null | |
| # background task (non-blocking) | |
| ping localhost > /dev/null & # returns [<jobNo>] <PID> | |
| ##### `jobs` (SHOW RUNNING BG JOBS) ##### | |
| ping localhost > /dev/null & # --> [1] 107 |
/procand/sysare pseudo filesystems; they're kept in memory by the computer the whole time/proccontains info abt active processes, system hardware, and kernel configuration/devis how to access hardware devices/syscontains info abt the hardware devices in/dev
pstree: shows parent/child processes' relationship
estysdesu
/ hardware.sh
Last active
July 21, 2019 11:47
[Shell: hardware info] #memory #architecture #cpu
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| ##### CPU ##### | |
| cat /proc/cpuinfo | |
| ##### arch (ARCHITECTURE) ##### | |
| # arch may denote the mode your computer is running in, but not necessarily is an indicator of what it support | |
| # https://superuser.com/questions/23214/why-does-my-mac-os-x-10-6-kernel-run-in-32-bit-mode | |
| arch # i386/x86 denotes 32-bit, x86_64 denotes 64-bit, a few other variations | |
| ##### lscpu (ARCHITECTURE) ##### | |
| lscpu #x86[_64] |
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| ##### `((` (DOUBLE PARENTHESIS) ##### | |
| # Bash only | |
| # arithmetic expansion | |
| (( a=25 )) # C style setting | |
| (( a++ )) && echo $a # a == 26; same as `(( ++a ))` | |
| (( a-- )) && echo $a # a == 25; same as `(( --a ))` | |
| # arithmetic evaluation | |
| (( t = a<45?7:11 )) # t == 7; if a < 45, then t = 7, else t = 11 | |
| # https://www.tldp.org/LDP/abs/html/loops1.html#FORLOOPC | |
| LIMIT=10 |
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| ##### ln (SYMLINKS) ##### | |
| # -n: no dereference (prevents recursion of directories by stopping link following) | |
| # -f: force if already exists by unlinking first | |
| # -s: symbolic | |
| # -d/-F: directory | |
| ln -sf <path/to/source/file> <path/to/dest/file> | |
| ln -sFn <path/to/source/dir> <path/to/dest/dir> |
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| ##### WINDOWS ##### | |
| $uri = 'https://sourceforge.net/projects/xming/files/Xming/6.9.0.31/Xming-6-9-0-31-setup.exe/download' | |
| curl -L $uri > Xming-setup.exe |
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| #!/usr/bin/env bash | |
| # https://github.com/estysdesu/dotFiles/blob/master/bash/.bash_profile | |
| alias ppPATH="echo $PATH | tr -s ':' '\n'" # each path member gets it's own line |