bash: command types and commands
阿新 • • 發佈：2020-10-09
- user
- sudo <command> <arguments>: to work as root user
- Terminal
- echo
- printf
- System and Env
- pgrep <command name>: to get command process
- /proc/$PID/environ: process <PID>'s environment
- pgrep <command name>: to get command process
- echo
- echo -e "<string with regexp>"
-
$ echo -e "1\t2\t3" > 1 2 3
-
- set color
- \e[1,31m: to set color red
- \e[0m: to reset color
- for text: reset=0; black=30; red=31; green=32; yellow=33; blue=34; magenta=35; cyan=36; white=37
- for background:reset=0; black=40; red=41; green=42; yellow=43; blue=44; magenta=45; cyan=46; white=47
-
$ echo -e "\e[1;31m test \e[0m" > test
-
$ echo -e "\e[1;41m test \e[0m" > test
- printf
- %s, %c, %d, %f
- -: left justifying
-
$ printf "%-5s %-5s %-5s\n" This is test > This is test
- <process>
-
$ pgrep bash > 8111 $ cat /proc/8111/environ > USER=aaaHOME=/u/aaaPATH=/bin...... $cat /proc/8111/environ|tr '\0' '\n' > USER=aaa HOME=/u/aaa PATH=/bin ....
- sss
- sss
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