learn android linux command line shell

We can always see in Android development that the log log content of the program is full of screens, and the information that really makes sense to the developer is submerged in the torrent, leaving developers at a loss and seriously impacting development efficiency. This article introduces several ways to filter adb logcat output in the shell command

We can always see in Android development that the log log content of the program is full of screens, and the information that really makes sense to the developer is submerged in the torrent, leaving developers at a loss and seriously impacting development efficiency. This article introduces several ways to filter adb logcat output in the shell command

command line Daquan learn and take notes >> Summer studyChapter One: What is a shell? 1 shellThe shell is an explanatory program that interacts with the Linux kernel, and we can interact with the operating system through the

= 0;i = 1; does {total + = $i; i++} while (total Gawk ' {total =0;-(i = 1;i Chapter 23rd using other shellsYou can try to learn to use zsh and support modularity.24th. Writing a simple script utilitySlightly25th. Create DATABASE, Web, and e-mail related scriptsThe side that writes the script to MySQL is available:MySQL mytest-u test Show tables;SELECT * FROM Employees where salary > 40000;Eofecho "This is a text message." | mail-s "Subject" [email pr

directly behind the. BASHRCfunction Addem{Echo $[$ [+ $]}This function is used anywhere on the system.2. Reading function filesYou can use the source command to add a function from the library file to the. BASHRCAdd it directly behind the. BASHRC. /home/xcy/myfuncsSo you can use the function inside the Myfuncs.17.8 exampleThis section describes the GNU Shtool Shell script function library. The Shtool libra

use external program files to run.(1) such as exit and CD are built-in commands$type exit$type CDSome commands have multiple implementations, such as PWD and Echo, which have both external and built-in commands#type-a EchoThe which only displays external command files.Type-a shows two implementations of each command.Tip: For multiple implementations of the command, the default execution is built-in, if you

echo "Top Ten Disk Space Usage" echo "for $CHECK _directories Directory" For Dir_check in $CHECK _directories Do echo "" echo "The $DIR _check Directory:" Du-s $DIR _check 2>/dev/null | Sort-rn | Sed ' {one, $D; =} ' | Sed ' N; s/\n//' | Gawk ' {printf $ ': "\ T" $ "t" $ "\ n"} ' Done Exit [Email protected]:~/shell/24zhang$ Run:./big_user.shOnly two directories/var/log/home are specified above, and the generated rep

the shell you are currently using. For example, even if you call a different shell in a terminal, the $SHELL remains unchanged. The code is as follows: $ echo $SHELL /bin/shell So, to find the current SHELL, you s

are currently using. For example, even if you call a different shell in a terminal, the $SHELL remains unchanged. The code is as follows: $ echo $SHELL/bin/shell So, to find the current SHELL, you should use $$ or $ $, but not $SHELL