isql command in unix shell script

. Sometimes we need to read the first line from the BEGIN statement block.We can specify some conditions for the rows that need to be processed, such as:The default field delimiter is a space. We can explicitly specify a delimiter with-F "delimiter": $ awk-f: ' {print $NF} '/etc/passwd$echo | awk ' {' grep root/etc/password | getline cmdout; print Cmdout} ' can read the output of an external shell command i

For Dev and UAT environments, databases must be in archive mode, but do not need to be backed up. Therefore, the constant increase in archive archiving logs results in a large amount of disk space consumption. In this case, you can use a shell script to automatically clear these archived logs at regular intervals. This article provides a script to clear archived

] ~]#/etc/profile or [[email protected] ~] #source/etc/profileMake the change effective, if there is no error stating the success.Verify that there is data in the log[Email protected] ~]# More/var/log/201107.log2011-07-21 17:29:08 ##### Root PTS/2 (192.168.23.250) # # # # # # # /etc/profileYou can see that there's already data inside.You can also usePrompt_command= ' {date ' +%y-%m-%d%T ##### USER: $USER IP: $SSH _client PS: $SSH _tty # # (History 1 | {read x cmd; echo "$cmd";}) ";} >> $HISTORY

SHELL script-full explanation of tr command usage and features, shell script-tr usage Directory:1.1 Introduction1.2 tr ing1.3 completely matched replacement1.4 compressed symbols1.5 Delete symbols and supplements 1.1 Introduction Tr is mainly used to map the result set, comp

Shell script -- cut command, shell script -- cut Directory:1.1 option description1.2 filter by field1.3 Use -- complement1.4 split by byte or character1.5 Use -- output-delimiter1.6 specify the range in cut 1.1 option description The cut

As a widely used debugger under Unix/linux, GDB not only provides rich commands, but also introduces scripting support: one for existing scripting language support, such as Python, where users can write Python scripts directly, and GDB calls the Python interpreter to execute The other is a command script, in which the user can write GDB commands that GDB has prov

(unset), then return to word, but do not change the value of var. ${var:=word} If the variable var is empty or has been deleted (unset), return to Word and set the value of Var to word. ${var:?message} If the variable var is empty or has been deleted (unset), then send message messages to the standard error output, which can be used to detect whether Var can be properly assigned.If this substitution appears in the she