bash Cookbook: Solutions and Examples for bash Users by Cameron Newham, Carl Albing, JP Vossen

By Cameron Newham, Carl Albing, JP Vossen

The major to studying any Unix procedure, in particular Linux and Mac OS X, is an intensive wisdom of shell scripting. Scripting is how to harness and customise the ability of any Unix method, and it's an important ability for any Unix clients, together with process directors OS X builders. yet underneath this easy promise lies a treacherous ocean of diversifications in Unix instructions and criteria.

bash Cookbook teaches shell scripting the best way Unix masters perform the craft. It provides quite a few recipes and tips for all degrees of shell programmers in order that an individual can turn into a educated consumer of the most typical Unix shell -- the bash shell -- and cygwin or different well known Unix emulation applications. Packed jam-packed with necessary scripts, besides examples that specify the right way to create larger scripts, this new cookbook supplies pros and tool clients every little thing they should automate regimen initiatives and let them to actually deal with their platforms -- instead of have their structures deal with them.

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Example text

Man Get information on a command. nice Reduce a job's priority. nohup Launch a command that will continue to run after logging out. openvt Run a program on the next available virtual terminal. passwd Set your login password. script Produce a transcript of your login session. su Become a different user, often the superuser. sudo Execute an authorized command as root or another user. tee Simultaneously store output in file and send to screen. time Time the execution of a command. wall Send a message to all terminals.

Updatedb Update the locate database. whereis Find command. which Print pathname of a command. Shell Programming Command Action basename Remove leading directory components from a path. echo Repeat command-line arguments on the output. envsubst Substitute the value of environment variables into strings. expr Perform arithmetic and comparisons. mktemp Generate temporary filename and create the file. printf Format and print command-line arguments. sleep Pause during processing. test Test a condition.

Showmount List exported directories on a remote host. swapoff Cease using device for swapping. swapon Begin using device for swapping. sync Write filesystem buffers to disk. tune2fs Manage an ext2 filesystem. umount Unmount a filesystem. warnquota Mail disk usage warnings to users. Managing the Kernel Command Action depmod Create module dependency listing. lsmod List kernel modules. modinfo Print kernel module information. modprobe Load and remove a module and its dependent modules. sysctl Examine or modify kernel parameters at runtime.

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